tag:blogger.com,1999:blog-35214090242378867572024-03-05T05:03:35.344+00:00Ganga fine mineralsMinerals & GemsAnonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.comBlogger74125tag:blogger.com,1999:blog-3521409024237886757.post-75538362005974810842014-12-27T22:07:00.001+00:002014-12-28T09:52:17.422+00:00British mineral shows for 2015<div dir="ltr" style="text-align: left;" trbidi="on">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKv3RdxVwtZ4qYP6s5k1AFQqqmF8Vk8doWpIjV77esxmqUasSw_MTUtsL8xkQZkf4QyMKUZOlYei7HVvsE38PXfZxIDcip6VjvS4k1nFMmZH6IIx7O1MTVDJK1Z6I9mBvC_ES3XNzy2Nr0/s1600/9104_-_Milano_-_Museo_storia_naturale_-_Fluorite_-_Foto_Giovanni_Dall'Orto_22-Apr-2007.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjKv3RdxVwtZ4qYP6s5k1AFQqqmF8Vk8doWpIjV77esxmqUasSw_MTUtsL8xkQZkf4QyMKUZOlYei7HVvsE38PXfZxIDcip6VjvS4k1nFMmZH6IIx7O1MTVDJK1Z6I9mBvC_ES3XNzy2Nr0/s1600/9104_-_Milano_-_Museo_storia_naturale_-_Fluorite_-_Foto_Giovanni_Dall'Orto_22-Apr-2007.jpg" height="424" width="640" /></a></div>
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I publish a list of M<i>ineral, Rock and Fossil Shows </i>which are going to take place in England during 2015.<br />
<a name='more'></a><br />
<table border="0" cellpadding="0" cellspacing="0" class="MsoNormalTable" style="mso-cellspacing: 0cm; mso-padding-alt: 0cm 0cm 0cm 0cm; mso-yfti-tbllook: 1184; width: 100%px;">
<thead>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">Date<o:p></o:p></span></b></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" width="48%"><div class="MsoNormal">
<b><span style="line-height: 115%;">Show
name<o:p></o:p></span></b></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" width="24%"><div class="MsoNormal">
<b><span style="line-height: 115%;">City<o:p></o:p></span></b></div>
</td>
</tr>
</thead>
<tbody>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">17.01.2015
- 18.01.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/106-mascalls-school-rockngem-show-kent-2015.html">Mascalls
School Rock n Gem Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Paddock
Wood<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">24.01.2015
- 25.01.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/107-chepstow-rock-gem-bead-show-2015.html">Chepstow
Racecourse Rock Gem 'n' Bead Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Chepstow<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">14.02.2015
- 15.02.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/108-cheltenham-rock-gemnbead-march-show-2015.html">Cheltenham-Rock
Gem 'n' Bead Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Cheltenham<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">28.02.2015
- 01.03.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/109-Harrogate-rockgemnbead-show-2015.html">Harrogate
Rock Gem 'n' Bead Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Harrogate<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">07.03.2015
- 08.03.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/110-kempton-rock-gem-march-show-2015.html">Kempton
Park Rock 'n' Gem March Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">London<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">21.03.2015
- 22.03.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/111-brighton-rock-gemnbead-april-show-2014.html">Brighton
Rock Gem 'n' Bead March Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Brighton<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">11.04.2015
- 12.04.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/112-newton-abbot-rockngem-show-2015.html">Newton
Abbot Rock Gem 'n' Bead Early Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Newton
Abbot<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">25.04.2015
- 26.04.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/113-newark-rock-gemnbead-april-show-2015.html">Newark
Rock Gem 'n' Bead April Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Newark<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">30.05.2015
- 31.05.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/114-somerset-rockngem-june-show-2015.html">Wincanton
Racecourse Somerset Rock Gem n Bead Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Wincanton<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">06.06.2015
- 07.06.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/126-kempton-park-rockngem-june-show-2015.html">Kempton
Park Rock Gem 'n' Bead June Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">London<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">04.07.2015
- 05.07.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/117-newcastle-rock-gem-bead-show-2015.html">Newcastle
Racecourse Rock Gem 'n' Bead July Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Newcastle<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">01.08.2015
- 02.08.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/118-kempton-rock-gem-august-show-2015.html">Kempton
Park Rock Gem 'n' Bead August Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">London<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">08.08.2015
- 09.08.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/119-welsh-rockngem-show-2015.html">Welsh
Rock 'n' Gem August Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Builth
Wells<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">15.08.2015
- 16.08.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/120-Harrogate-rockgemnbead-show-2015.html">Harrogate
Rock Gem 'n' Bead Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Harrogate<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">19.09.2015
- 20.09.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/121-newark-rock-gemnbead-september-show-2015.html">Newark
Rock Gem 'n' Bead September Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Newark<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">24.10.2015
- 25.10.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/122-newton-abbot-gemnbead-october-show-2015.html">Newton
Abbot Rock Gem n Bead October Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Newton
Abbot<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">31.10.2015
- 01.11.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/123-kempton-rock-gem-october-show-2015.html">Kempton
Park Rock 'n' Gem November Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">London<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">14.11.2015
- 15.11.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/124-cheltenham-rock-gemnbead-November-show-2015.html">Cheltenham-Rock
Gem 'n' Bead November Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Cheltenham<o:p></o:p></span></div>
</td>
</tr>
<tr>
<td style="padding: 0cm 0cm 0cm 0cm; width: 26.7%;" width="26%"><div class="MsoNormal">
<b><span style="line-height: 115%;">21.11.2015
- 22.11.2015 </span></b><span style="line-height: 115%;"><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 48.68%;" valign="top" width="48%"><div class="MsoNormal">
<span style="line-height: 115%;"><a href="http://www.rockngem.co.uk/show-dates/details/125-brighton-rock-gemnbead-novemberl-show-2015.html">Brighton
Rock Gem 'n' Bead November Show</a><o:p></o:p></span></div>
</td>
<td style="padding: 0cm 0cm 0cm 0cm; width: 24.62%;" valign="top" width="24%"><div class="MsoNormal">
<span style="line-height: 115%;">Brighton<span style="font-size: 10pt;"><o:p></o:p></span></span></div>
</td>
</tr>
</tbody></table>
<br />
<div class="MsoNormal">
<o:p><span style="font-size: x-small;">Source: <a href="http://www.rockngem.co.uk/show-dates.html">rockngem.co.uk</a></span></o:p></div>
</div>
Anonymoushttp://www.blogger.com/profile/18225617534638033509noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-52661029597606721492014-08-18T23:56:00.004+01:002014-08-18T23:57:18.033+01:00Ford Hallam, l'artista del metallo<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBxOnOahHmqxDixaGXyE_Pg0Cepnrk3LqlHhwe4xB8LENm62znkJ0sjdK0ojJq6EOExbasYVK7azIh5xsM4h8NPSfPzyu_LLO_ZqbbfwvdEqIrqSJEk9vwLogNSgdTSKuOiTw2RPpAcoxZ/s1600/Utsushi_The-Search-for-Katsuhiras-Tiger_01.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgBxOnOahHmqxDixaGXyE_Pg0Cepnrk3LqlHhwe4xB8LENm62znkJ0sjdK0ojJq6EOExbasYVK7azIh5xsM4h8NPSfPzyu_LLO_ZqbbfwvdEqIrqSJEk9vwLogNSgdTSKuOiTw2RPpAcoxZ/s1600/Utsushi_The-Search-for-Katsuhiras-Tiger_01.jpg" height="360" width="640" /></a></div>
<br />
<div style="text-align: justify;">
Ford Hallam è uno scultore inglese specializzato nella lavorazione dei metalli secondo lo stile tradizionale giapponese. Dopo oltre 30 di studio e pratica in quest'arte i risultati sono assolutamente stupefacenti. Queste tecniche sono applicate principalmente alla fabbricazione di artefatti come gli <i>tsuba</i>, la parte che divide l'impugnatura dalla lama della Katana e serve a proteggere le mani.</div>
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<div style="text-align: justify;">
Vi raccomando di guardare questi due video che accompagnano la nascita di un capolavoro chiamato Utsushi.</div>
<div style="text-align: justify;">
<br /></div>
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/pM0VnL30rDc?feature=player_embedded' frameborder='0'></iframe></div>
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<br /></div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-49345977920715647182014-07-20T16:27:00.000+01:002014-07-20T16:56:32.962+01:00Fotoreportage: una miniera di diamanti russa<br />
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Pubblico un incredibile <a href="http://gelio.livejournal.com/196486.html#cutid1">fotoreportage</a> realizzato dal fotografo russo Stephanov Slava sulla ormai inattiva miniera di diamanti Mirny mine, locallizata nella gelida regione siberiana. Le dimensioni del cratere sono incredibili così come il contrasto con gli edifici (case, chiese e palazzi) che sono nati sul suo bordo. Vale davvero la pena spendere qualche minuto per apprezzare queste affascinanti fotografie che accompagnano il processo estrattivo in tutte le sue fasi.</div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-86339340335769182542014-02-03T22:54:00.000+00:002014-02-05T22:14:02.359+00:00Annette Gabbedey<div class="separator" style="clear: both; text-align: center;">
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/A9DvHUTsmGU?feature=player_embedded' frameborder='0'></iframe></div>
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Nonostante Annette Gabbedey sia nata senza le dita, è riuscita a superare le difficoltà e diventare una grande artista orafa specializzata nella creazione di gioielli. Questa grave malformazione non le ha impedito di crearsi una carriera ed oggi vende le sue opere per svariate migliaia di euro. Le gemme che preferisce usare? Diamanti e Opali.</div>
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Ecco alcune delle opere di Annette:</div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-27453449362091018682014-01-21T20:57:00.005+00:002014-01-26T22:31:27.787+00:00Pseudomorfosi<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRCZ1rTgXkHTlCWqgRyxSNwSA6FAgEIS46eNqcl7GC2LDFnvvSVbtyyS_771XJswiw-deYyW3mBUmPviVeicKlDu-Wj6o7QxgyjWIKL8woVogZM_agcy3iLNkoTRzfQmv3GLkY0qgJC7Kt/s1600/copperps0212090001.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRCZ1rTgXkHTlCWqgRyxSNwSA6FAgEIS46eNqcl7GC2LDFnvvSVbtyyS_771XJswiw-deYyW3mBUmPviVeicKlDu-Wj6o7QxgyjWIKL8woVogZM_agcy3iLNkoTRzfQmv3GLkY0qgJC7Kt/s1600/copperps0212090001.jpg" height="300" width="400" /></a></div>
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I minerali pseudomorfi sono una delle tante meravigliose sorprese che ci riserva la natura. Nel dettaglio si definiscono tali tutti quei minerali la cui composizione chimica e struttura cristallina corrispondono a un minerale <span style="font-family: Times, Times New Roman, serif;">mentre</span> la loro forma è quella di un'altra specie mineralogica.</div>
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Si tratta quindi di minerali in preda a una crisi di identità....</div>
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Vediamo qualche esempio proveniente dal Museo di Storia Naturale di Londra:</div>
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<span style="font-family: Times, 'Times New Roman', serif;">Tale raro e bizzarro evento può avvenire per 3 ragioni:</span></div>
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<li style="text-align: justify;"><span style="font-family: Times, Times New Roman, serif;"><b>per sostituzione</b>. Quando un minerale viene rimpiazzato per un'altra specie mineralogica con una composizione chimica totalmente differente.</span></li>
<li style="text-align: justify;"><span style="font-family: Times, Times New Roman, serif;"><b>per incrostazione</b>. In questo tipo di pseudomorfosi si ha la formazione di una copertura di un minerale al di sopra di un altro. </span></li>
<li style="text-align: justify;"><span style="font-family: Times, Times New Roman, serif;"><b>per alterazione</b>. In questo tipo di pseudomorfosi vi è stata solo una parziale mutazione della composizione chimica. Un esempio è quando la limonite assume la pseudoforma della pirite trattenendone gli atomi di ferro.</span></li>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-11833709112275633322013-12-13T21:29:00.001+00:002013-12-13T22:05:41.513+00:00Mineral Artwork<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhn6UrscnrzYMPUHbZc12m35SdKQ5wouCCUu3mE-nK1H8wXzyzuy0IbYYADEyNyRzgDx1TbM6NuZz5YFRbkqIxihC8chNpE5uR6k7a4r1swqzwSRQ4yR8VDi6f6xtHtPHlkG4NiVEDryY2V/s1600/CarlyWaito_Specimens+postcard.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhn6UrscnrzYMPUHbZc12m35SdKQ5wouCCUu3mE-nK1H8wXzyzuy0IbYYADEyNyRzgDx1TbM6NuZz5YFRbkqIxihC8chNpE5uR6k7a4r1swqzwSRQ4yR8VDi6f6xtHtPHlkG4NiVEDryY2V/s1600/CarlyWaito_Specimens+postcard.jpg" height="640" width="444" /></a></div>
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Recentemente mi sono imbattuto in rete nei disegni di Carly Waito, un'artista canadese che ha realizzato degli acquarelli interessanti che hanno come soggetto dei minerali. La qualità e il risultato sono, a mio parere, eccezzionali, tanto da sembrare più simili a foto che a schizzi fatti con un pennello e da essere recentemente pubblicati sulla celebre rivista Rocks & Minerals.</div>
Si può trovare una raccolta delle sue opere sul sito: <a href="http://www.carlywaito.com/">carlywaito.com</a> .<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinXLMU9N8_mSBkxCl6VFs3aeL7KJEkkkb7i474112Kx3PinYMKgLz0Mm0gb1Zboh-C439tl-Y-uQimHivyZ7-2pZk-MHpQeuDiHWG8PAjDELGhGJQeIoOhD9MkU-weDZykAOYLIbWh4Ivv/s1600/amethyst-mountain-600p2.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEinXLMU9N8_mSBkxCl6VFs3aeL7KJEkkkb7i474112Kx3PinYMKgLz0Mm0gb1Zboh-C439tl-Y-uQimHivyZ7-2pZk-MHpQeuDiHWG8PAjDELGhGJQeIoOhD9MkU-weDZykAOYLIbWh4Ivv/s1600/amethyst-mountain-600p2.jpg" height="320" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Ametista. Cortesia di <a href="http://www.carlywaito.com/">carlywaito.com</a></td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_G_PSKm0zGjRvMC9bDJXvAZGIHeUKVHkBoXvaSQ_BJZNRu7VOnkMfrylw9gRPRUlU0kaHOt7pQgSjQNIFjrdEdzJ56kQzL0zSJlxDVueijAlQ2aO0SAxx2HaCHCF4Txcglc3oc9Z2H0HL/s1600/pyrite-600p.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi_G_PSKm0zGjRvMC9bDJXvAZGIHeUKVHkBoXvaSQ_BJZNRu7VOnkMfrylw9gRPRUlU0kaHOt7pQgSjQNIFjrdEdzJ56kQzL0zSJlxDVueijAlQ2aO0SAxx2HaCHCF4Txcglc3oc9Z2H0HL/s1600/pyrite-600p.jpg" height="400" width="332" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pirite. Cortesia di <a href="http://www.carlywaito.com/">carlywaito.com</a></td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6Jl257BD3-J_O21Hde1lq46nIDwjjKWE4UKg9XPidTmUdQLXrP0kbOj_YmGdGw8HIkaeP0Ud5vux7X-77wI02BMwjUYSc8x5T6Ncj3s8mdcdOfk-m6w44k-2SG-FeWqpo19r6rQNiC5Bs/s1600/rhodochrosite-600p.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh6Jl257BD3-J_O21Hde1lq46nIDwjjKWE4UKg9XPidTmUdQLXrP0kbOj_YmGdGw8HIkaeP0Ud5vux7X-77wI02BMwjUYSc8x5T6Ncj3s8mdcdOfk-m6w44k-2SG-FeWqpo19r6rQNiC5Bs/s1600/rhodochrosite-600p.jpg" height="400" width="271" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Rodocrosite. Cortesia di <a href="http://www.carlywaito.com/">carlywaito.com</a></td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjg_eYij0fVn1Lm9fTN7UZ92bfBlZ93fMhUe9IJ2R490lUjyUHTl_ALsO8Wlg8HVk0ep9wQbOe1EHAAuRRaIWck8qlTeadEcoC9rTw3MpVeYHUTb8yRikUIi_oAqRc4hWzIJZWGy59bDbUN/s1600/smoky-quartz-5-600p1.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjg_eYij0fVn1Lm9fTN7UZ92bfBlZ93fMhUe9IJ2R490lUjyUHTl_ALsO8Wlg8HVk0ep9wQbOe1EHAAuRRaIWck8qlTeadEcoC9rTw3MpVeYHUTb8yRikUIi_oAqRc4hWzIJZWGy59bDbUN/s1600/smoky-quartz-5-600p1.jpg" height="366" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Quarzo fumè. Cortesia di <a href="http://www.carlywaito.com/">carlywaito.com</a> </td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh07Vx4mVBP-yIgYySPEBwv1Wfd2IN1alJJd1ssXE6H8PIIvokAH9QKCNnCrICwAWanTPQylI5-0VR4ioPSyHwaBdc2TVeYFS-1YF7BIbZMVICcHohnXPg2HsJPygkmi3VJpaOuCsYxJpyK/s1600/Smoky-Quartz-7.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh07Vx4mVBP-yIgYySPEBwv1Wfd2IN1alJJd1ssXE6H8PIIvokAH9QKCNnCrICwAWanTPQylI5-0VR4ioPSyHwaBdc2TVeYFS-1YF7BIbZMVICcHohnXPg2HsJPygkmi3VJpaOuCsYxJpyK/s1600/Smoky-Quartz-7.jpg" height="361" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Ametista. Cortesia di <a href="http://www.carlywaito.com/">carlywaito.com</a></td></tr>
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<br />Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-90809807742744068612013-12-13T20:46:00.001+00:002013-12-13T20:50:25.312+00:00Il Piedistallo antisismico & la Salsiccionite<br />
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<object class="BLOGGER-youtube-video" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" data-thumbnail-src="https://ytimg.googleusercontent.com/vi/42mRLbe_NLM/0.jpg" height="266" width="320"><param name="movie" value="https://youtube.googleapis.com/v/42mRLbe_NLM&source=uds" /><param name="bgcolor" value="#FFFFFF" /><param name="allowFullScreen" value="true" /><embed width="320" height="266" src="https://youtube.googleapis.com/v/42mRLbe_NLM&source=uds" type="application/x-shockwave-flash" allowfullscreen="true"></embed></object></div>
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"<i>Piedistallo antisismico: consigliato a collezionatori giapponesi e californiani</i>". Anche questo è quello che si poteva vedere nella fiera di Monaco 2013. Nell'edizione del 2012, invece, c'era stata l'anteprima mondiale di un nuovo misterioso minerale: la Salsiccionite:</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnJuS6kEw0SvHTph_ZpqJVa4CoI2tbIG4Il5XSapKrMgljfXH-0AfFjpAnqOggKg1l7rToo7BwD8cV7dG0gYNrbtLpLY9mgndGeVnfOgOyRXPyZgar26IrvjlbxMjNmZ4U_r4Qcipq66Q6/s1600/Img_3404.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgnJuS6kEw0SvHTph_ZpqJVa4CoI2tbIG4Il5XSapKrMgljfXH-0AfFjpAnqOggKg1l7rToo7BwD8cV7dG0gYNrbtLpLY9mgndGeVnfOgOyRXPyZgar26IrvjlbxMjNmZ4U_r4Qcipq66Q6/s1600/Img_3404.jpg" height="640" width="425" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Un raro esemplare di Salsiccionite. Luogo di ritrovamento: Monaco di Baviera.</td></tr>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-51235119077386507132013-11-28T21:11:00.002+00:002013-12-23T16:26:21.804+00:00La storia del diamante più famoso<br />
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/t-ihhvxdu7Q?feature=player_embedded' frameborder='0'></iframe></div>
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Pubblico un interessante video che riassume brevemente la storia del "Diamond Hope", una delle gemme più conosciute al mondo. A renderla celebre è sopratutto la intricata serie di digrazie legate al suo passato e ai suoi possessori. Questa serie di eventi sfortunati le ha conferito la nomea di gemma maledetta.</div>
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Oggi può essere ammirato nel museo dello Smithsonian institute, dove attira ogni anno più di 6.000.000 di visitatori.<br />
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<iframe allowfullscreen='allowfullscreen' webkitallowfullscreen='webkitallowfullscreen' mozallowfullscreen='mozallowfullscreen' width='320' height='266' src='https://www.youtube.com/embed/W4VZ4AYccMU?feature=player_embedded' frameborder='0'></iframe></div>
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Posto anche un secondo video, questa volta della History channel, molto più lungo e che entra maggiormente nel dettaglio della storia "maledetta" di questa pietra preziosa unica.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQf90T_VFavGWZqrFIlfvRtEHstpZ_cqNhR3NEEpE4m5-S3jSUnKd0Qqq6j5Avk9Nr38uZYAJyxydIqIf-Kj64NHG1az9wHeKm6Pn7lzcPSzD8pJl9D4GoqTDyy663MBvnAJGHac1V0Bl5/s1600/n-ORANGE-VIVID-large570.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhQf90T_VFavGWZqrFIlfvRtEHstpZ_cqNhR3NEEpE4m5-S3jSUnKd0Qqq6j5Avk9Nr38uZYAJyxydIqIf-Kj64NHG1az9wHeKm6Pn7lzcPSzD8pJl9D4GoqTDyy663MBvnAJGHac1V0Bl5/s640/n-ORANGE-VIVID-large570.jpg" width="640" /></a></div>
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Intanto questo ultimo mese ha fatto registrare dei nuovi record nei prezzi dei diamanti unici, ritenuti tali sia per loro le dimensioni sia per il loro colore. Il "<i>Fire Diamonds</i>", un diamante arancione di 14.82 carati è stato venduto il 12 novembre a Ginevra per 35.540.000 $, battendo il record di prezzo per carate. Il giorno successivo nella stessa città svizzera il "Pink Star", un diamante rosa di 59.60 carati, ha raggiunto lo strabiliante prezzo di 83.200.000 $, essendo il prezzo più alto mai pagato in assoluto nella storia per una singola gemma.<br />
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<tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXvO3cOD2eWvFk9qCtqi4l-_PW-kKImva5u97dbiAm2tZmgJymhpqv_AXfWjB-ZSk_8r26XCiuQa2Vm7wBdqOC6zUfPXzw34BBERXyqqp8_3lZRbdbqpr95ykcT1JJpCXF9TBtWPMnEt87/s1600/pink_star_diamond_promo1.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="380" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXvO3cOD2eWvFk9qCtqi4l-_PW-kKImva5u97dbiAm2tZmgJymhpqv_AXfWjB-ZSk_8r26XCiuQa2Vm7wBdqOC6zUfPXzw34BBERXyqqp8_3lZRbdbqpr95ykcT1JJpCXF9TBtWPMnEt87/s640/pink_star_diamond_promo1.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px;">Foto del Pink Star Diamond<br />
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-26902389119923855012013-10-28T23:15:00.003+00:002013-10-28T23:19:53.663+00:00Previsioni del tempo su Giove? Tempesta di diamanti<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHuDQ9yc-zgwsGhdhmhP4NDGGvZaxk8RcRj-Xrcy-R6PB1crbyU_lXnYz3kAGweFHugwFeaYO4XeAU24BSWdPF_XlsnHEdDCVF4Nap0__HG1_fdFFNNePmeCsMju5UqRuKF6oZJI5KwNpo/s1600/n-SATURN-large570.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHuDQ9yc-zgwsGhdhmhP4NDGGvZaxk8RcRj-Xrcy-R6PB1crbyU_lXnYz3kAGweFHugwFeaYO4XeAU24BSWdPF_XlsnHEdDCVF4Nap0__HG1_fdFFNNePmeCsMju5UqRuKF6oZJI5KwNpo/s1600/n-SATURN-large570.jpg" /></a></div>
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Due ricercatori americani dell'Università Wisconsin Madison, Mona Delitsky e Kevin Baines, hanno recentemente diffuso una teoria per la quale su Giove e su Saturno non sarebbero infrequenti piogge di diamanti. Secondo gli studi pubblicati su <a href="http://www.nature.com/news/diamond-drizzle-forecast-for-saturn-and-jupiter-1.13925#/b1">Nature</a>, l'incontro di atomi di Metano, Carbonio e fulmini nell'atmosfera di questi due pianeti sarebbe la causa della creazione di diamanti, che sempre secondo i due studiosi, potrebbero raggiungere dimensioni eccezionali, tanto da essere chiamati "diamondbergs” (Iceberg di diamanti).</div>
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La teoria afferma che i fulmini attraversando le parti superiori dell'atmosfera causano la creazione di particelle di fuliggine di carbonio a partire dalla scissione delle molecole di metano. Queste particelle attratte verso il nucleo solido del pianeta vengono sottoposte a temperature e pressioni abbastanza forti da trasformale prima in graffite e successivamente in una vera e propria pioggia di diamanti.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1M6RWQLCtpavqH1YpcD38-cAZ3cHV4fhXG3ZVBz-k2mOOHb25Zll86NDN8e_VlD4xPvZDGGA3SPRIeFUWUdkyIabSp6isshxglmpUQLeDxPBO0TLwwUpysIddqkdK036Bh8g3QvtiYeTi/s1600/00000.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg1M6RWQLCtpavqH1YpcD38-cAZ3cHV4fhXG3ZVBz-k2mOOHb25Zll86NDN8e_VlD4xPvZDGGA3SPRIeFUWUdkyIabSp6isshxglmpUQLeDxPBO0TLwwUpysIddqkdK036Bh8g3QvtiYeTi/s400/00000.jpg" width="400" /></a></div>
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Eppure non c'è niente di più sbagliato di affermate che un diamante su Giove o Saturno è per sempre. Infatti esisterebbe strettamente per il tempo necessario ad avvicinarsi ulteriormente alla superficie rocciosa, dove una volta che la temperatura raggiunge gli 8.000° C ne causa lo "scioglimento" istantaneo.</div>
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Questa interessante teoria segue a quelle altrettanto recenti che indicavano i nuclei di Urano e Nettuno essere dei giganteschi diamanti. </div>
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L'unica cosa certa è che oggigiorno non esistono certezze riguardo la composizione e la struttura di questi pianeti esterni del nostro sistema solare.</div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-14917577087373786712013-10-22T21:21:00.000+01:002013-11-01T02:37:20.649+00:00La russia mette in vendita il suo gioiello<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwu5IO52oun_IpcyWln32L1-CSMm3kGSO4ifyboUvmLjsv_k3SpBZb482LEcS8AAgKpjRZRkLv5EW69gv_wlv0jpdeWvcgephmE_3OZ_wVLdu4Dt0T2GXrpcgXD4MsGsvo8BgRq5Yz8z-r/s1600/russia-slashes-stake-in-diamond-miner-alrosa-set-for-1-6-bn-float.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwu5IO52oun_IpcyWln32L1-CSMm3kGSO4ifyboUvmLjsv_k3SpBZb482LEcS8AAgKpjRZRkLv5EW69gv_wlv0jpdeWvcgephmE_3OZ_wVLdu4Dt0T2GXrpcgXD4MsGsvo8BgRq5Yz8z-r/s1600/russia-slashes-stake-in-diamond-miner-alrosa-set-for-1-6-bn-float.jpg" /></a></div>
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Il più prezioso gioiello russo non è una delle corone ereditate degli zar e nemmeno una delle pietre preziose custodite nel Kremlino, bensì si tratta della compagnia statale che controlla l'estrazione dei diamanti sul territorio dell'ex unione sovietica. Le quote che il governo russo possiede nell'Alrosa, la più grande compagnia miniatrice del suo settore al mondo, della quale vi avevo già parlato in questo <a href="http://gangafineminerals.blogspot.it/2013/08/il-piu-grande-produttore-mondiale-di.html">post</a>, verranno messe in vendita nelle prossime settimane.</div>
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<a name='more'></a>L'annuncio dell'offerta si terrà il 28 ottobre.<br />
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Se i rumori saranno confermati, dal 44% di possesso dell'attuale capitale sociale lo stato russo rimarrà con il 30%. Questa decisione si inquadra nel piano di privatizzazioni e di monetizzazione varato dal Kremlino nel 2010. All'inizio di quest'anno l'amministrazione russa aveva già diluito la suo quota azionaria nel VTB Group, una delle più grandi banche sovietiche.</div>
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Il valore complessivo dell'Alrosa, secondo quanto riportato dal portavoce del governo ruteno si dovrebbe aggirare sugli 8,7 miliardi di dollari. La vendita di un pacchetto del 14% dovrebbe portare in dote alle casse dello stato quasi un miliardo di €. </div>
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In questo modo l'Alrosa, che era una delle pochissime imprese focalizzate sull'estrazione del diamante ad essere quotata su un listino borsistico, passerà dal 9% quotato a libero mercato attuale fino al 23%. Anche se per molti continuerà ad essere irraggiungibile come investimento in quanto le azioni saranno vendute esclusivamente nella borsa di Mosca.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ_6ftI0APVobOH2_m-knpzgf2P6WF9kQt_Bj_fTN3uzZaO2FbcedcocE8HgYiUwLc8DQN29vMNFcnUhvY5brVWc3SWjHFAjvZk930N4STkBirHofvy73gYkTjuWCRngDB1o3LmRi9hFVA/s1600/72498_550641468298562_1419231393_n.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="261" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ_6ftI0APVobOH2_m-knpzgf2P6WF9kQt_Bj_fTN3uzZaO2FbcedcocE8HgYiUwLc8DQN29vMNFcnUhvY5brVWc3SWjHFAjvZk930N4STkBirHofvy73gYkTjuWCRngDB1o3LmRi9hFVA/s400/72498_550641468298562_1419231393_n.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Vista aerea di una delle miniere siberiane di Alrosa.</td></tr>
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<a href="http://ipo.alrosa.ru/ipo/item/index.php?ID=343">AGGIORNAMENTO</a>:</div>
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Il 28 Ottobre 2013 lo stato russo ha pubblicato l'IPO (Initial Public Offering), per un valore complessivo di 1.3 miliardi di dollari in relazione alla vendita del 16% del capitale azionario del colosso Alrosa. </div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-5436356526724041122013-10-15T11:16:00.000+01:002013-11-01T03:11:07.437+00:00Saranno famosi<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmGm5pmGHl4-qzMYlDR_58BI4HAxAoS0FbU0QyY5FOpbdw3hyz0FsdSc6T3tCqDI7v3wEZ1yNyocKRyk7rh67c7z5T7jzwC_Y53iSj3D4dQYhbTDmSuvJ37g-ZlQu8UM2kzrlIeikhyphenhyphenhHo/s1600/800_600_583713774bfdfcdd09bc4.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="315" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmGm5pmGHl4-qzMYlDR_58BI4HAxAoS0FbU0QyY5FOpbdw3hyz0FsdSc6T3tCqDI7v3wEZ1yNyocKRyk7rh67c7z5T7jzwC_Y53iSj3D4dQYhbTDmSuvJ37g-ZlQu8UM2kzrlIeikhyphenhyphenhHo/s400/800_600_583713774bfdfcdd09bc4.jpg" width="400" /></a></div>
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Armalcolite, Bixbite, Goethite, Smithsonite, Hiddenite, Andradite, Forsterite, Gibbsite, Bazzite e Alessandrite. Che cosa hanno in comune questi 10 minerali? </div>
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La risposta non è né il sistema cristallino, né la provenienza geografica e neppure il peso specifico, bensì si tratta del fatto che i loro nomi derivino da quelli di personaggi celebri, siano essi mineralogisti, naturalisti oppure persone che pur non essendo legate al mondo della geologia vi hanno lasciato una traccia.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7jZQu0zv5xI0K1bMl4oZjgkDaK1RkKtIdyqz1xwaDs6flfITcH2vZ68xDCK3X7wUXcBRJgl0PSGTvE6kPCnJfiltCvcpwFHQBCNpJYsQg36BTwziet6g6M3sRAwKyk2pWgGEWWa-n0aac/s1600/Armalcolite_-_Wat_Lu_Mine,_Mogok,_Myanmar.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7jZQu0zv5xI0K1bMl4oZjgkDaK1RkKtIdyqz1xwaDs6flfITcH2vZ68xDCK3X7wUXcBRJgl0PSGTvE6kPCnJfiltCvcpwFHQBCNpJYsQg36BTwziet6g6M3sRAwKyk2pWgGEWWa-n0aac/s400/Armalcolite_-_Wat_Lu_Mine,_Mogok,_Myanmar.jpg" width="400" /></a></div>
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L'armalcolite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">(Mg,Fe</span><sup style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">++</sup><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">)Ti</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">O</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">5</sub></span>) è un minerale ricco in titanio che fu ritrovato nel cratere della tranquillità, sulla luna, dagli astronati dell'Apollo 11. IL suo nome deriva appunto dalle prime tre lettere dei loro tre nomi: <b>Arm</b>strong, <b>Ald</b>rin e <b>Col</b>lins.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7i-uMchifEQbLJzvq47NK1f9UrXjl25fGP9Ah1KvNwqie_7KauAU3_1GAdyxieSCcYVPludWBJlX9lch0WDueHOsuXrGEfokg3bE8FK-OXjrxSYKmTHXDZFwMqJl0WBbJA-B849hK8plR/s1600/bixbite-3.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj7i-uMchifEQbLJzvq47NK1f9UrXjl25fGP9Ah1KvNwqie_7KauAU3_1GAdyxieSCcYVPludWBJlX9lch0WDueHOsuXrGEfokg3bE8FK-OXjrxSYKmTHXDZFwMqJl0WBbJA-B849hK8plR/s400/bixbite-3.jpg" width="380" /></a></div>
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La bixbite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; font-family: sans-serif; line-height: 16.890625px; text-align: left;">Be</span><sub style="background-color: #f9f9f9; font-family: sans-serif; line-height: 1em; text-align: left;">3</sub><span style="background-color: #f9f9f9; font-family: sans-serif; line-height: 16.890625px; text-align: left;">Al</span><sub style="background-color: #f9f9f9; font-family: sans-serif; line-height: 1em; text-align: left;">2</sub><span style="background-color: #f9f9f9; font-family: sans-serif; line-height: 16.890625px; text-align: left;">(SiO</span><sub style="background-color: #f9f9f9; font-family: sans-serif; line-height: 1em; text-align: left;">3</sub><span style="background-color: #f9f9f9; font-family: sans-serif; line-height: 16.890625px; text-align: left;">)</span><sub style="background-color: #f9f9f9; font-family: sans-serif; line-height: 1em; text-align: left;">6</sub>)</span>, di cui vi avevo già parlato in questo <a href="http://gangafineminerals.blogspot.it/2013/05/la-bixbita.html">post</a>, è la varietà rossa di Berillo. Il suo nome deriva da Maynard Bixby, un mineralogista statunitense. Attualmente si preferisce denominare questa pietra come berillo rosso, per evitare di confondersi con un altro minerale, la Bixbyite, il cui nome deriva sempre da Bixby.</div>
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Restando nella famiglia dei berilli, la Morganite fu denominata tale da Kunz in onore al banchiere J. P. Morgan, noto collezionista.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilOUeItoDeyK7I7NVjLrxwDrWFAr4QkrMMilkIV5e32fEhSOv3QwfCHxeyzYuWJnIKegewSUUmps8OKUIY22pEnWz9x1hELKrw-cNxdIP6hXCe9VP4rnZF3m_W6EFx89me4ppJ7oTgZZgV/s1600/goethite_aes_602_ishpeming_mi_141.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="342" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEilOUeItoDeyK7I7NVjLrxwDrWFAr4QkrMMilkIV5e32fEhSOv3QwfCHxeyzYuWJnIKegewSUUmps8OKUIY22pEnWz9x1hELKrw-cNxdIP6hXCe9VP4rnZF3m_W6EFx89me4ppJ7oTgZZgV/s400/goethite_aes_602_ishpeming_mi_141.jpg" width="400" /></a></div>
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La Goethite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Fe</span><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">O(OH)</span></span>), un idrossido di ferro, fu chiamata così in onore a Johann Wolfgang van Goethe, celebre scrittore e umanista tedesco.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiN82oqWwXdzJpQVdsHi0FeK1MKFA0JiVLJKt-2DIAF7tjOBf1pOr6-FP1pqjuj-Res_Xv_rBGBM2Cq6vf_ZulPEJ918z6gcSDSfe4QSnZaYWM1K7VwgGQl3XwYnu7H8soRJy-Vrc_cLN_w/s1600/original_11220.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiN82oqWwXdzJpQVdsHi0FeK1MKFA0JiVLJKt-2DIAF7tjOBf1pOr6-FP1pqjuj-Res_Xv_rBGBM2Cq6vf_ZulPEJ918z6gcSDSfe4QSnZaYWM1K7VwgGQl3XwYnu7H8soRJy-Vrc_cLN_w/s400/original_11220.jpg" width="400" /></a></div>
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La Smithsonite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">ZnCO</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3</sub></span>) è un carbonato di zinco, che in passato si pensava veniva confuso con l'emimorfite. F. S. Beudant, geologo francese, nel 1832 omaggiò James Smithson donando il suo nome a questo minerale. Beudant cognò il nome di altri minerali tra cui Anglesite, Cerussite e Bismuthite e fu omaggiato a sua volta con il minerale Beudantite.</div>
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Smithson è anche stato il promotore del "Smithsonian institution", che oggi conta con il più vasto e importante museo di storia naturale al mondo (oltre 126.000.000 di campioni distribuiti su 123.000 metri quadrati).</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi36eCAnQ0ASWl55_hifT8rGIaaWYaEtWPgemzbP2Q77rNU_SQRdjWrWsDG_wH77Is-A-zGK11VKuVgA1xjW4t3WN6qIeyN47osxIqZw8HQtlwUdNCXb2-IodJLOaD0p6cjWl5gQbE3qd6q/s1600/hidm110.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi36eCAnQ0ASWl55_hifT8rGIaaWYaEtWPgemzbP2Q77rNU_SQRdjWrWsDG_wH77Is-A-zGK11VKuVgA1xjW4t3WN6qIeyN47osxIqZw8HQtlwUdNCXb2-IodJLOaD0p6cjWl5gQbE3qd6q/s400/hidm110.jpg" width="400" /></a></div>
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La Hiddenite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">LiAlSi</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">O</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">6</sub></span>) è la varietà verde di Spodumeno che trova un largo impiego in gioielleria. William Earl Hidden era un esploratore americano, incarico da Thomas Edison di cercare giacimenti di platino in North Carolina. </div>
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La Kunzite, varietà rosa di spodumeno deve il suo nome da Kunz, celebre mineralogista newyorkino. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxH8b6zP6xkiKoz9rRsY-a8UHL6yF-Tq3O9ns51QdlISh7WKoHRwGydBEoz6MxS1KleYVxKHMwKj4OmuNPothvq-A2sTpbq_5nLq0YC0npo7Eb7EAEEJUyqp_0gH7fIhDiSP7yrCNLWKyQ/s1600/Andradite-Stilbite-Ca-dem05a.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="337" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxH8b6zP6xkiKoz9rRsY-a8UHL6yF-Tq3O9ns51QdlISh7WKoHRwGydBEoz6MxS1KleYVxKHMwKj4OmuNPothvq-A2sTpbq_5nLq0YC0npo7Eb7EAEEJUyqp_0gH7fIhDiSP7yrCNLWKyQ/s400/Andradite-Stilbite-Ca-dem05a.jpg" width="400" /></a></div>
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L'andradite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Ca</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Fe</span><sup style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3+</sup><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">(SiO</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">4</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">)</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3</sub></span>)è un minerale molto estetico, appartenente alla famiglia dei granati. Il suo nome deriva da Jose Bonifacio Andrade da Silva, statista e naturalista brasiliano. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNM3jdsPhxZ1TgS2KeKbfGCEhqz-m5msHyoSN2tTsbO1qmCMysROZjo9NCmoY5TbrTVqz2N4vbZJouNZRerFuIjLCiMQdzezstnJPF65OnjkZh-tNO_fWiCTk6QR8s3zUDluTd3t2f0bcx/s1600/800_600_7231884014efabf9812bee.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhNM3jdsPhxZ1TgS2KeKbfGCEhqz-m5msHyoSN2tTsbO1qmCMysROZjo9NCmoY5TbrTVqz2N4vbZJouNZRerFuIjLCiMQdzezstnJPF65OnjkZh-tNO_fWiCTk6QR8s3zUDluTd3t2f0bcx/s400/800_600_7231884014efabf9812bee.jpg" width="355" /></a></div>
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La Forsterite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Mg</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">SiO</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">4</sub></span>) è un minerale ricco in magnesio che fa parte della famiglia dell'Olivina. Il suo nome deriva dal naturalista tedesco Johann Reinhold Forster.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC4n9TqjEgw3hpYtQVNV7_60_GUgwcWi07aLg7Pd1Fu79kDaEnFV6mkbgc0as7iiObYelVTOqxASv4gIzBO7LF5e6nn0CZtMRFcqdaUru7L_F0oelQbgbnatVjKhMW4dO7Lh3FFQkViE4i/s1600/Gibbsite_Aluminum_hydroxide_Minas_Gerais,_Brazil_2998.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC4n9TqjEgw3hpYtQVNV7_60_GUgwcWi07aLg7Pd1Fu79kDaEnFV6mkbgc0as7iiObYelVTOqxASv4gIzBO7LF5e6nn0CZtMRFcqdaUru7L_F0oelQbgbnatVjKhMW4dO7Lh3FFQkViE4i/s400/Gibbsite_Aluminum_hydroxide_Minas_Gerais,_Brazil_2998.jpg" width="400" /></a></div>
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La Gibbsite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Al(OH)</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3</sub></span>) è un idrossido di alluminio e deve il suo nome a George Gibbs, mineralogista e collazionatore statunitense che diede un ampio contributo a questa scienza.</div>
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Anche qualcuno di noi italiani ha dato il proprio nome a dei minerali. La Bazzite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Be</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">3</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">(Sc,Al)</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">Si</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">6</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">O</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">18</sub></span>), un berillo molto raro e simile all'acquamarina, ne è un esempio. Il suo nome deriva dall'ingegnere Alessandro Bazzi che per primo ne scoprì un esemplare a Baveno, Piemonte, nel 1915.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhZ3PonSerIZwrVvQ6njXeNdUE-AcUP4-tJ4Xlyq34GgCjUhW1spEqzs7s7rtLQh79xJy9HWQUG8BBuby5I1b2yloOWmk2pNSLGDe-dF2pIht8wLuAvxE8aoTObCb3ZMq2XMC1xYfq-0rWr/s1600/Chrysobe%CC%81ryl_var._alexandrite_(Bre%CC%81sil)_1_.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="288" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhZ3PonSerIZwrVvQ6njXeNdUE-AcUP4-tJ4Xlyq34GgCjUhW1spEqzs7s7rtLQh79xJy9HWQUG8BBuby5I1b2yloOWmk2pNSLGDe-dF2pIht8wLuAvxE8aoTObCb3ZMq2XMC1xYfq-0rWr/s400/Chrysobe%CC%81ryl_var._alexandrite_(Bre%CC%81sil)_1_.jpg" width="400" /></a></div>
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L'Alessandrite (<span style="font-size: x-small;"><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">BeAl</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">2</sub><span style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 19.1875px; text-align: start;">O</span><sub style="background-color: #f9f9f9; color: #252525; font-family: sans-serif; line-height: 1em; text-align: start;">4</sub></span>) è una varietà di Crisoberillo e uno dei minerali più preziosi al mondo a causa della sua capacità di cambiare colore dipendendo dal tipo di luce a cui viene sottoposto. </div>
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Il primo ritrovamento di questo minerali avvenne nei monti Urali e il suo nome è un omaggio allo zar di Russia Alessandro II.</div>
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La lista completa dei minerali il cui nome deriva da persoaggi celebri è rintracciabile su <a href="http://en.wikipedia.org/wiki/List_of_minerals_named_after_people">wikipedia</a>.</div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-40314450611956111202013-10-01T02:51:00.000+01:002013-10-01T02:51:24.801+01:00Gemme dallo spazio: Pallasite<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQzykzD5dFDTaggaAn976mFUJQSPrqWBKLXH98D2MrPvWhGnqNwMN0ZlWZ8qfWuo1O9s0baYu5zg2mdg3Rae-6A_WzK1wxJLeyzEFwHYpOaDyiYjy8eJJj63qmKDDWjtfrMEss2-VXU2k5/s1600/0101.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQzykzD5dFDTaggaAn976mFUJQSPrqWBKLXH98D2MrPvWhGnqNwMN0ZlWZ8qfWuo1O9s0baYu5zg2mdg3Rae-6A_WzK1wxJLeyzEFwHYpOaDyiYjy8eJJj63qmKDDWjtfrMEss2-VXU2k5/s1600/0101.jpg" height="400" width="368" /></a></div>
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In uno dei quattro padiglioni della <a href="http://gangafineminerals.blogspot.it/2013/09/prossimi-eventi-ottobre-2013.html">fiera di Monaco 2013</a>, più precisamente quello dedicato al mondo delle gemme, sarà possibile ammirare alcune pietre preziose che provengono dallo spazio. </div>
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Non si tratta di Kryptonite ma di gemme di <i>Olivina</i> estratte da un tipo di meteorite ferro-roccioso conosciuto con il nome di <i>Pallasite.</i></div>
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Il nome di queste meteoriti deriva dal suo scopritore, il naturalista tedesco Peter Simon Pallas, che ne rinvenne il primo esemplare nel 1772 in Siberia.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEianMPCD4UZMLB7k2JqOBCDFMOdoBhVkuykoSTMPGeIkBg7uFPC-BEQ1vlqFJn_v-DjRNoM08NoZsUJ5LtrEqbQIe7bb6pUS57AajEisptP_3wrHEZQMm8qZbc9GhM6hg1x3MAW8rOQ3g9R/s1600/Meteorite-pallasite-Glorieta.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEianMPCD4UZMLB7k2JqOBCDFMOdoBhVkuykoSTMPGeIkBg7uFPC-BEQ1vlqFJn_v-DjRNoM08NoZsUJ5LtrEqbQIe7bb6pUS57AajEisptP_3wrHEZQMm8qZbc9GhM6hg1x3MAW8rOQ3g9R/s1600/Meteorite-pallasite-Glorieta.jpg" height="291" width="400" /></a></div>
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Queste rocce extraterrestri sono formate da una lega di ferro-nichel contenente al suo interno cristalli di olivina che superano il centimetro.</div>
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Le Pallasiti vengono normalmente vendute a fette, ed è bene controllare che i cristalli verdi nel momento del taglio non abbiano subito un distaccamento seguito per un incollatura degli stessi sulla matrice. Questo fatto deve essere tenuto in considerazione nel momento di stabilirne il prezzo.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkHn7x7LY8SHYeiqEPwKYpv9rOdSKY1Lm5ZoPe-fAen9EN3RMDhRWnr3kWaQGGWOzc5goGBdHBzXtHB4zDR1sec4QJP0u0PlUXcYiLCgJb6JmsIm3y1_fvh7JDNaXYF2t7Ka4A7_0nN_2E/s1600/Fukang-Meteorite-450x476.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkHn7x7LY8SHYeiqEPwKYpv9rOdSKY1Lm5ZoPe-fAen9EN3RMDhRWnr3kWaQGGWOzc5goGBdHBzXtHB4zDR1sec4QJP0u0PlUXcYiLCgJb6JmsIm3y1_fvh7JDNaXYF2t7Ka4A7_0nN_2E/s1600/Fukang-Meteorite-450x476.jpg" height="400" width="377" /></a></div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-26535391130127314182013-09-26T23:30:00.002+01:002013-09-27T00:31:43.084+01:00Geologia basica: un pò di glossario<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguSN4TE8mGCl4MZc9CuMdk1HO0PguhUub5m3RC44pnPK_SpjmGRQidoW4hirp4c6fnZxWREoIvo-qBOd5IN8JoZYzAGzXrxyooQ-9p6THY7lE7bREFYFFJvCpbSGlqnDayxh1YILIJhe-U/s1600/800px-Permian-Triassic_boundary.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEguSN4TE8mGCl4MZc9CuMdk1HO0PguhUub5m3RC44pnPK_SpjmGRQidoW4hirp4c6fnZxWREoIvo-qBOd5IN8JoZYzAGzXrxyooQ-9p6THY7lE7bREFYFFJvCpbSGlqnDayxh1YILIJhe-U/s1600/800px-Permian-Triassic_boundary.jpg" height="426" width="640" /></a></div>
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Nel post di oggi voglio provare ad approfondire alcuni termini tecnici che vengono anche abbastanza frequentemente impiegati in conversazioni comuni e nelle quali possono assumere un significato differente.</div>
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In geologia, una <i>roccia</i> è un agglomerato di uno o più minerali e che conseguentemente non presentano una composizione chimica uniforme. Il termine <i>pietra</i> ha un significato identico e può essere usato come sinonimo di "roccia". In una conversazione normale e corrente il termine roccia può indicare uno conformazione geologica (per esempio un masso o una rupe). </div>
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Le rocce si dividono dipendendo dalla loro genesi in <i>sedimentarie, vulcaniche (dette anche ignee) oppure metamorfiche</i>. </div>
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Il numero dei diversi tipi di roccia si aggira sui 500, delle quali 65 sono di genesi magmatica interna alla terra, almeno un altro centinaio di tipo igneo superficiale, una cinquantina del tipo sedimentario e le metamorfiche sono alcune centinaia.</div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVZocZ1B7s39LFhbdXHxVxeSWVcfFCOEUCABJniJKO-RhYGi-lzCDr4Z3coupkAjRSD9XNLWFX_0Tw69wqgzsatjsqY9wuwV-fHce4_YLT2nZ0hRUg1k-saFQ7zk5W71iVVrKOz5LKz7HX/s1600/CIMG2496.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgVZocZ1B7s39LFhbdXHxVxeSWVcfFCOEUCABJniJKO-RhYGi-lzCDr4Z3coupkAjRSD9XNLWFX_0Tw69wqgzsatjsqY9wuwV-fHce4_YLT2nZ0hRUg1k-saFQ7zk5W71iVVrKOz5LKz7HX/s1600/CIMG2496.JPG" height="300" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Arenaria: un tipo di roccia sedimentaria</td></tr>
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Un <i>minerale</i> è invece una sostanza quasi sempre inorganica che presenta una composizione e una struttura chimica definita. Il diamante ha la stessa composizione chimica della graffite (materiale di cui sono fatte le lavagne di scuola) ma la struttura cristallina, ossia la disposizione che hanno assunto gli atomi, è differente.<br />
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Sono stati ritrovati sino ad oggi sul nostro pianeta circa 4.000 tipi di minerali differenti.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHfNO76p3W1ZiHokCxgEHyOa6yNfpeFc02cO5KfNR4xYT0p7Xrhcpqxum867FZItBApyqrpBDbFiNpobU26yFO0xu-3_ZjPunny0nGnrun4K8sXcAw4uOXb50-FYctZZj6m7PWU0_ixv47/s1600/Big_Amethyst.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgHfNO76p3W1ZiHokCxgEHyOa6yNfpeFc02cO5KfNR4xYT0p7Xrhcpqxum867FZItBApyqrpBDbFiNpobU26yFO0xu-3_ZjPunny0nGnrun4K8sXcAw4uOXb50-FYctZZj6m7PWU0_ixv47/s400/Big_Amethyst.jpg" height="300" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Un esempio di minerale: l'Ametista.</td></tr>
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I <i>mineraloidi</i> sono sostanze che hanno un'origine geologica, una composizione chimica simile ai minerali ma non presentano una struttura cristallina (non avendo le caratteristiche di omogeneità, periodicità e simmetria). Alcuni esempi di mineraloide organico sono le perle, l'ambra, il giaietto mentre dei mineraloidi inorganici possono essere la limonite, l'ossidiana o l'opale.<br />
Rientrano in questa categoria anche i liquidi inorganici che si trovano in natura come l'acqua o il mercurio nativo.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQZGbzRMYkK7itMQafP__KcV3UczQZOcJWeF69WCurRg7E2Kdt3hOOUavaUUog421UOeXfOPhYyk4biAJqJDw2ExucCLGxb01KCmJO-wAwzqJd-3YzRagRK091ILSNo6pEOroHcLotszNp/s1600/93008252.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQZGbzRMYkK7itMQafP__KcV3UczQZOcJWeF69WCurRg7E2Kdt3hOOUavaUUog421UOeXfOPhYyk4biAJqJDw2ExucCLGxb01KCmJO-wAwzqJd-3YzRagRK091ILSNo6pEOroHcLotszNp/s400/93008252.jpg" height="260" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Giaietto, un tipo di lignite presente nel nord della Spagna e nelle aree baltiche. </td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQRx9fLt6GCnzoXr-Ndc7gOX4rvTTu1iN5lb5kfTL2ruR0v_Cy2WvcKrBNsBWtsdq9sU1sHjEP-eW_S_rawgE3xvUYDA_2phaZHmwO7meDAWsCDzTxCZyt8_4krZcWtkAMZsRmuqqSZs_6/s1600/Opal_banded.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQRx9fLt6GCnzoXr-Ndc7gOX4rvTTu1iN5lb5kfTL2ruR0v_Cy2WvcKrBNsBWtsdq9sU1sHjEP-eW_S_rawgE3xvUYDA_2phaZHmwO7meDAWsCDzTxCZyt8_4krZcWtkAMZsRmuqqSZs_6/s400/Opal_banded.jpg" height="252" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Un bell'esempio di Opale</td></tr>
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Il termine <i>pietra preziosa</i> si riferisce a una gemma e di conseguenza stiamo parlando di un singolo minerale e non di una roccia, che è suscettibile di lavorazione (taglio e lucidatura) e possono dunque essere impiegate in gioielleria.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ5rMWm6i8JinyFZtUCA1Zkt9bRiiD2a5osm14OxJU8FAEjMfchy4t19ix77QFSoL1BBIlltuYPzFVC-CFt3Knk4JQam1Gr3fuY6myp22x1gCjHHnXPX7ITS3kxZaOB4HRYeS4bhSPMiyh/s1600/743px-MELLITE_Taille%CC%81e_Hongrie.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiJ5rMWm6i8JinyFZtUCA1Zkt9bRiiD2a5osm14OxJU8FAEjMfchy4t19ix77QFSoL1BBIlltuYPzFVC-CFt3Knk4JQam1Gr3fuY6myp22x1gCjHHnXPX7ITS3kxZaOB4HRYeS4bhSPMiyh/s400/743px-MELLITE_Taille%CC%81e_Hongrie.jpg" height="321" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Una rara gemma di Mellite, un minerale organico.</td></tr>
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<span style="font-size: xx-small;">Fonti: <a href="http://www.ccmr.cornell.edu/education/ask/?quid=1183">http://www.ccmr.cornell.edu/education/ask/?quid=1183</a>, </span></div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-60625990028111697472013-09-26T22:53:00.000+01:002013-09-26T22:53:09.044+01:00Museo di storia naturale di Cremona<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSrgw2HJPy3nZ8LbjdAK4vfvYMqe7hqrMzZPGrWiicW5XubNRkmDw7BauRru04fS0tNj7xpY6CyAT7rcPPc0yt45_EnEyGhPk6ZM3igPEvdLihcGi_mMbKGI8-g2eai1WDetYiVDXbbKDu/s1600/IMG_4182.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiSrgw2HJPy3nZ8LbjdAK4vfvYMqe7hqrMzZPGrWiicW5XubNRkmDw7BauRru04fS0tNj7xpY6CyAT7rcPPc0yt45_EnEyGhPk6ZM3igPEvdLihcGi_mMbKGI8-g2eai1WDetYiVDXbbKDu/s1600/IMG_4182.JPG" width="266" /></a></div>
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Cremona, oltre ad essere famosa per essere la città delle tre "T" (Torrone, Torrazzo e Tettone) , è dal 2011 la sede di un museo di storia naturale piccolo ma significativo., che comprende anche un'ala dedicata ai minerali.</div>
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Ho visitato questo sito domenica scorsa e pubblico un report fotografico al quale è possibile accedere cliccando <a href="https://plus.google.com/u/0/photos/114234639957392821619/albums/5928034226612499201">qui</a>.</div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-10273710597874202402013-08-07T23:36:00.001+01:002013-08-08T08:43:06.852+01:00Il tesoro di Jonas, un ritrovamento leggendario<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCigN3TQN513I2aJtoqguCvtTDNTvskbD-IOOxPIWVqAqm7pa7iuK587L8_o9EDUrKBk7NFuXh6o4ZwKGdPtu7UXHUyWVnXzHzH2CT4CJ9i1GBIOLJt6NsT7isT88GoZWNoIq_fDqmzPj4/s1600/foguete.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCigN3TQN513I2aJtoqguCvtTDNTvskbD-IOOxPIWVqAqm7pa7iuK587L8_o9EDUrKBk7NFuXh6o4ZwKGdPtu7UXHUyWVnXzHzH2CT4CJ9i1GBIOLJt6NsT7isT88GoZWNoIq_fDqmzPj4/s1600/foguete.jpg" width="292" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">O "Foguete", <i>Il Razzo</i>, una rubelite di 107 cm</td></tr>
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Il più grande ritrovamento di Tormalina Rubelite (la varietà rossa di questo minerale) che il mondo ha visto fino ad oggi avvenne venerdì 24 di Marzo del 1978 nella "Miniera di Jonas", i cui proprietari erano Ailton Barbosa e Jonas de Souza Lima e che si trovava nel municipio di Conselheiro Pena, Minas Gerais, Brasile.<br />
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La miniera di Jonas era vicina della famosa miniera di Itatiaia e vi lavorava da circa un anno Ailton Barbosa ma non aveva prodotto ancora nessun risultato, ed il suo locatore Jonas de Souza Lima aveva deciso di cessare il contratto e restituire la terra al suo proprietario la settimana successiva, quando all'improvviso si imbatterono in una sacca gemmifera.</div>
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Lo scavo venne paralizzato e mandarono a chiamare Jonas, che si trovava ad una ottantina di Km di distanza, nella città di Governador Valadares. Conforme a quanto dichiarò alla stampa lo stesso Jonas, quando finalmente raggiunse la miniera, l'entrata continuava chiusa e c'era molta aspettativa nell'aria mentre entrva nella galleria per verificare l'importanza della scoperta. Siccome il buco che dava accesso alla sacca era molto stretto, Jonas chiese al <i>Garimpeiro</i> Pixinguinha di dare un'occhiata. Questi rispose di aver visto una tormalina di dieci centimetri di spessore.<br />
Jonas diede l'ordine di far detonare due candelotti di dinamite per allargare l'entrata. Quando la polvere si posò la prima tormalina che Jonas vide fu "O Tarugo" ("La sbarra"), un esemplare straordinario che misurava 82x32 cm e che pesava approssimativamente 74Kg.<br />
Nel tetto di quell'enorme geode che era la sacca gemmifera, pendeva a testa in giù "A Joininha" ("la piccola Jonas"), un pezzo di 320Kg che per essere estratto senza danni dovette essere appoggiato ad una pila di pneumatici mentre veniva separato dalla base.<br />
La Signora Edma, moglie di Jonas e suo figlio Joninho raggiunsero la miniera appena riceverono la notizia del ritrovamento ed aiutarono ad imballare le pietre principali in un lavoro che durò più di 20 ore.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgC44Y0FRfAUQy28KBybolHQnnX6AGXWi6Da3cl__VK8qb6Lj4uGR_Vv5VTC6T8xTkO-V6gLfY2yeakzSgxiyYgh9ptUpQ_x7H6GrH1NvIv8L7FNoBUtqP2OyChK724cqvzOPLVz4qtGDpC/s1600/image026.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="368" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgC44Y0FRfAUQy28KBybolHQnnX6AGXWi6Da3cl__VK8qb6Lj4uGR_Vv5VTC6T8xTkO-V6gLfY2yeakzSgxiyYgh9ptUpQ_x7H6GrH1NvIv8L7FNoBUtqP2OyChK724cqvzOPLVz4qtGDpC/s640/image026.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><span style="text-align: justify;">"O Tarugo", <i>La Sbarra</i>, 82x32 cm e 74 Kg di peso. </span></td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-_JlEhNLcq6UHpUiobxp-UrWiTSUBUkakvTgyexyle8k4ll9UK4TUYMjncIIJ5RALbA_5cfaqdXIn2vr4_969HAhtzgVAuPippU4iasXLyuevKupHUI4QXwF-sxdwuVOQK0Fyb-DPCgm7/s1600/image0241.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="340" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi-_JlEhNLcq6UHpUiobxp-UrWiTSUBUkakvTgyexyle8k4ll9UK4TUYMjncIIJ5RALbA_5cfaqdXIn2vr4_969HAhtzgVAuPippU4iasXLyuevKupHUI4QXwF-sxdwuVOQK0Fyb-DPCgm7/s400/image0241.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">A Joininha, 320 Kg. I due cristalli di Rubelite misurano rispettivamente 50x25 e 36x25.</td></tr>
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Nonostante l'ordine di mantenere assoluto riserbo, poche ore più tardi l'intera città di Governador Valadares sapeva della fantastica scoperta. Jonas trasferì il tesoro nel suo deposito ed iniziò la classificazione delle pietre protetto da diverse guardie. Vendette subito tutte quelle pietre che considerava minori, tra le quali grossi cristalli qualità gemma e gruppi artistici formati da Rubelita su una matrice di Cleavelandite e Quarzo.<br />
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Jonas rimase in possesso delle pietre più impressionanti, con le quali 8 mesi più tardi realizzò un'esposizione aperta al pubblico e di cui la metà degli incassi servì per finanziare gli ospedali pubblici della regione. Ancora oggi "O Tarugo, A Joininha, O Foguete ed A Flor de Lis" sono i maggiori esemplari di Rubelite mai scoperti da un essere umano sul nostro pianeta.<br />
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<tr><td class="tr-caption" style="text-align: center;">"A Flor de Lis", <i>Il Fiordaliso</i>.</td></tr>
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Ancora più straordinario è sapere che i due soci, Jonas e Ailton, stavano per abbandonare la loro impresa a causa della mancanza di fondi e che per comprare gli ultimi candelotti di dinamite Ailton vendette la sua Volkswagen Fusca, oppure che in seguito alla scoperta Jonas fu vittima di un attentato dal quale fortunatamente uscì illeso.<br />
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Mr. Roger Titeux, rappresentante del Museo di storia naturale di Parisi, inviato ad ammirare le Rubeliti rimase scioccato e pianse commosso da tanta bellezza. Le sue parole furono le seguenti: <i>"Le due pietre più piccole già sarebbero state per me una sorpresa enorme. Ma quando Jonas tolse il panno che copriva la terza per me fu un shock tremendo. Mai nella mia vita avevo vista una cosa del genere, in nessuno dei musei che avevo visitato."</i><br />
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Non è dato sapere qual è stato il destino di queste 4 meraviglie della natura. Alcune voci dicono che "A Juninha" sarebbe stata comprata dal collezionista statunitense Barry Yampol mentre "O Tarugo" è l'unica che permane in Brasile ancora oggi.<br />
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<span style="font-size: x-small;">Fonti: traduzione libera dal libro "Minerais e pedras preciosas do Brasil" di Andrea Bartorelli e Carlos Cornejo, Edizioni Solaris, Sao Paulo, 2010.</span></div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-33243409472430766302013-07-27T19:04:00.000+01:002013-07-27T20:51:04.293+01:00Una montagna d'argento sotto il mare<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUFUAWH2IBrpOzDFIM6sjm2GEXNHJ35IJLRIjMuVfmCiUlppdaTJtjvCChyec84G_TW1ROS-7yNmJRKEb1TCNkhlhdjXDFoz4E6xgcopNkUWsL_TkRMJcB2JCa6a6qq9QSg4jrjrw-OMMM/s1600/ss+Gairsoppa-Project-Silver-Bar.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjUFUAWH2IBrpOzDFIM6sjm2GEXNHJ35IJLRIjMuVfmCiUlppdaTJtjvCChyec84G_TW1ROS-7yNmJRKEb1TCNkhlhdjXDFoz4E6xgcopNkUWsL_TkRMJcB2JCa6a6qq9QSg4jrjrw-OMMM/s1600/ss+Gairsoppa-Project-Silver-Bar.jpg" height="400" width="298" /></a></div>
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<a href="http://www.shipwreck.net/index.php">Odissey Marine Exploration</a>, una compagnia che si dedica alla ricerca di tesori sprofondati sui fondali oceanici, ha annunciato il ritrovamento di 61 tonnellate di lingotti d'argento. La nave <i>SS Gairsoppa, </i>che trasportava il prezioso carico, fu affondata da un U-boat tedesco nel lontano febbraio del 1941 a 300 miglia dalle coste irlandesi. Il valore del rinvenimento ha un valore stimato superiore ai 27 milioni di euro.</div>
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Si tratta di una delle più grandi operazioni messe a segno da questa compagnia che è quotata nel Nasdaq di New York, e secondo fonti della stessa impresa sarebbe il più pesante e profondo ritrovamento di metalli preziosi mai avvenuto. Considerando che il relitto giace ad una profondità di 4,8 Km di profondità non è difficile credergli!</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOOmRIW0mE8ftoP9-B20MVUhw5gzXxHiXA-WNDA9E_IcvyE0QiuQ4WtOTzN5gpS28_tykNNxQPRsVubHFhUOx7eYNa2z5rkLnc8Xy8z3Fk9BfdzYNg9fk7RNUGnC5gj1VMTuTEXRLP4KNa/s1600/112.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiOOmRIW0mE8ftoP9-B20MVUhw5gzXxHiXA-WNDA9E_IcvyE0QiuQ4WtOTzN5gpS28_tykNNxQPRsVubHFhUOx7eYNa2z5rkLnc8Xy8z3Fk9BfdzYNg9fk7RNUGnC5gj1VMTuTEXRLP4KNa/s1600/112.jpg" height="223" width="400" /></a></div>
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Il governo britannico aveva assicurato il carico nel 1941 sotto un programma conosciuto come "War Risk Insurance" ed avendo pagato i possessori dell'argento per la sua perdita, oggi ne è divenuto il legittimo proprietario. Gli accordi resi pubblici tra il governo con sede a Londra e il management della compagnia americana dicono che l'80% del valore del tesoro spetta a quest'ultima... una cifra che quindi supera i 20 milioni di euro.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuSfo82FwzE4OaNCcr99uDmQrVU1EIQS1BTkZt_A1S-FrybLAv4-GxgmKRvOE5Mzk-ZZxrHuiP05OR0NkZoDClvpeD5rUHHl5lrwqpOWbx0aGA5G5KJdWOM4kRCuc0_WQdjF664Q4NqCeH/s1600/223.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhuSfo82FwzE4OaNCcr99uDmQrVU1EIQS1BTkZt_A1S-FrybLAv4-GxgmKRvOE5Mzk-ZZxrHuiP05OR0NkZoDClvpeD5rUHHl5lrwqpOWbx0aGA5G5KJdWOM4kRCuc0_WQdjF664Q4NqCeH/s1600/223.JPG" height="211" width="320" /></a></div>
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Nel 2014 la <a href="http://www.shipwreck.net/index.php" style="text-align: justify;">Odissey Marine Exploration</a> compierà vent'anni di attività. Si calcola che in questo tempo si sia resa protagonista di diverse scoperte, per un totale di oltre 50.000 monete antiche e 14.000 artefatti. Resta celebre il rinvenimento nel 2007 al largo della costa di Gibilterra del carico di monete d'oro e argento (oltre 17 tonnellate!!) appartenuto alla nave spagnola <a href="http://en.wikipedia.org/wiki/Nuestra_Se%C3%B1ora_de_las_Mercedes">Nuestra señora de la mercedes</a> e che ha visto scoppiare un caso legale e diplomatico tra la compagnia e il governo spagnolo, passato ai posteri con il nome di <a href="http://en.wikipedia.org/wiki/Black_Swan_Project">Black Swan Project</a>.<br />
Dopo quasi 6 anni di battaglie nei tribunali, nel febbraio del 2012 due aerei dell'esercito spagnolo sono atterrati in Florida e hanno riportato in patria le monete che avevano un valore vicino ai 400 milioni di euro.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZSTq9cIEQa7j3LGuw2J6IwHc7a2kxzyLBPcBuTI47FL9rfb8wFodeBe4IeRS48Q_kgJ3At_5DrCacwisqLu7nvyQGcm1dfG1CnIShJUZV8MYmqXzHOA80r1b3ghkSAPmrn47T0fZij0O1/s1600/444.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiZSTq9cIEQa7j3LGuw2J6IwHc7a2kxzyLBPcBuTI47FL9rfb8wFodeBe4IeRS48Q_kgJ3At_5DrCacwisqLu7nvyQGcm1dfG1CnIShJUZV8MYmqXzHOA80r1b3ghkSAPmrn47T0fZij0O1/s1600/444.jpg" height="223" width="400" /></a></div>
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La Nuestra señora de la Mercedes era una fregata spagnola salpata da Montevideo scortata da altre tre navi con un enorme carico di monete. Questo tesoro sarebbe dovuto finire a Napoleone. Infatti esisteva un <a href="http://it.wikipedia.org/wiki/Trattato_di_San_Ildefonso_(1796)">accordo segreto</a> tra il governo di Madrid e quello di Parigi, che obbligava il primo a pagare al secondo una tassa di 72 milioni di franchi ogni anno fino a quando la Spagna non avesse dichiarato guerra all'Inghilterra.<br />
I britannici avendo saputo dell'accordo, della data di partenza dell'oro e essendo consapevoli che l'unico attracco possibile sarebbe potuto essere Cadiz studiarono un piano per intercettare la piccola flotta. Il 5 Ottobre 1804, il capitano Graham Moore raggiunse e affondò la Nuestra señora de la mercedes, oltre a catturare le altre tre navi.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4mpxB7qsXu8trLXM0Mjk3xgkR0J5yrxfeVojStfEddoFSQeUFTPrh4IulToFpqa49XEx288VdDOgf2-BIMXmH27YEnYY8o4y4sbDNRLmDVxsTavJhGjbZLxrqmk568RRRNBSjob5TFBaD/s1600/Francis_Sartorius_-_Four_frigates_capturing_Spanish_treasure_ships,_5_October_1804.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4mpxB7qsXu8trLXM0Mjk3xgkR0J5yrxfeVojStfEddoFSQeUFTPrh4IulToFpqa49XEx288VdDOgf2-BIMXmH27YEnYY8o4y4sbDNRLmDVxsTavJhGjbZLxrqmk568RRRNBSjob5TFBaD/s1600/Francis_Sartorius_-_Four_frigates_capturing_Spanish_treasure_ships,_5_October_1804.jpg" height="265" width="400" /></a></div>
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I fatti che susseguono sono la dichiarazione di guerra tra Inghilterra e Spagna, fatto che si risolverà tragicamente per quest'ultima appena un anno dopo, ad ottobre del 1805 quando l'Ammiraglio Nelson senza perdere una sola nave riuscì ad annientare le flotte spagnole e francesi unite, nella famosa battaglia di Trafalgar. Durante questo episodio Nelson perderà la vita, ma le sue gesta venne consegnate per sempre alla storia.<br />
Negli anni successivi le alleanze si invertiranno, infatti Napoleone con la scusa di invadere il Portogallo occupa i punti nevralgici della Spagna, dilaniata dalla lotta per il potere tra Carlo IV e suo figlio Ferdinando VII e costringe entrambi ad abdicare a favore del fratello Giuseppe Bonaparte. Inizia una guerra tra Francia contro Spagna e Portogallo, entrambe supportate dagli Inglesi. Fino a quando Sir Arthur Wellesley, conosciuto come Duca di Wellington dopo la battaglia di Talavera, porteranno le giubbe rosse fino a Parigi. Ma questa è un'altra storia....<br />
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-27063070890805417972013-07-14T23:21:00.000+01:002013-07-17T06:23:03.085+01:00Come trasformare un diamante in una fontana di luce<div class="separator" style="clear: both; text-align: center;">
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Nessuno sapeva esattamente di cosa fossero composti i diamanti fino a quando 2 secoli fa Antoine Lavoisier ha provato scinetificamente che erano formati da atomi di carbonio. Indubbiamente si trattò di un esperimento costoso che consistette nell'esporre a un forte calore un diamante fino a vederlo bruciare e svanire esattamente come fanno tutti i materiali basati sul carbonio (per esempio la graffite o il carbone). Lo stesso esperimento ripetuto nel vuoto</div>
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Si trattò di una grande contribuzione al progresso scientifico ma non evitò a Lavoisier di venire ghigliottinato qualche anno più tardi durante la rivoluzione francese. </div>
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Se siete abbastanza ricchi da buttare via un diamante gemma per puro divertimento, scaldatelo con un cannello ossidrico e gettatelo in un'ampolla contenente ossigeno liquido e ammirate come si trasforma in una vera e propria fontana di luce. Se invece, come me, non avete raggiunto questo livello di ricchezza guardatevi questo video dove qualcun altro lo ha fatto per voi.</div>
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<span style="font-size: x-small;">Fonte:<a href="https://www.blogger.com/%C2%A0http://blog.israelidiamond.co.il/post/Watch-A-Diamond-Turn-Into-A-Fiery-Fountain.aspx?utm_source=Copy+of+July+09%2C+2013&utm_campaign=constantcontact_may22&utm_medium=email"> http://blog.israelidiamond.co.il/</a></span>Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-61663101277809546512013-06-24T21:38:00.000+01:002013-06-24T21:50:55.818+01:00Collection de Minéraux de Jussieu<div class="separator" style="clear: both; text-align: center;">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBLvGOcw-kTLbR8C7kzCuScFqom8E8OHZ364SXDqNqQ0GUvKPBh5JTAfj4LiiL1QNCp9Z9nb0aehywG6VCtDFdiqOS9Z99IK7wQ1R2Bjeub1BTCfVFy0gCteg9NfEoukeAjXiTZu-9JG-6/s1600/jussieu.tiff" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="291" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjBLvGOcw-kTLbR8C7kzCuScFqom8E8OHZ364SXDqNqQ0GUvKPBh5JTAfj4LiiL1QNCp9Z9nb0aehywG6VCtDFdiqOS9Z99IK7wQ1R2Bjeub1BTCfVFy0gCteg9NfEoukeAjXiTZu-9JG-6/s640/jussieu.tiff" width="640" /></a></div>
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Un paio di settimane fa ho avuto il piacere di rivisitare il museo di minerali dell'Università di Pierre e Marie Curie che ospita una delle più antiche e meravigliose collezioni di minerali che esistano. Fu infatti, creata per decreto imperiale nel 1809, anno in cui a regnare era Napoleone Bonaparte, e da allora è stata arricchita nel corso degli anni attraverso l'acquisizione e la donazione di campioni che possono essere definiti solamente come straordinari.</div>
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L'inventario completo comprende oltre 13.000 minerali di cui però solamente 1.500 sono esposti (divisi in 24 vetrine e ordinati secondo la composizione chimica e la struttura cristallina nel caso dei silicati).</div>
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La collezione era stata creata con scopi didattici ed è "solo" dal 1969 che si è trasformata in un museo aperto al pubblico.</div>
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Attualmente, l'esposizione si trova sottoterra ed è necessario scendere due piani di scale (o in alternativa prendere un anonimo ascensore) per raggiungerla. Si tratta però di un museo estremamente ben curato, dove la forma e la disposizione delle bacheche è stata inspirata dalla sala dei gioielli della Corona Iraniana. </div>
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Tra i pezzi più belli vi sono due Tormaline dal cappello blu, delle quali vi avevo già parlato in questo <a href="http://gangafineminerals.blogspot.it/2012/12/le-tormaline-dal-cappello-blu.html">post</a>, alcuni berilli (acquamarine, smeraldi, morganite, eliodori) assolutamente unici per dimensioni, trasparenza e abito cristallino. Altri esemplari da ricordare sono alcuni cristalli di Kunzite con un forte <a href="http://gangafineminerals.blogspot.it/2013/01/pleocroismo.html">pleocroismo</a>, il cristallo di Tetraedrite più grande che si conosca e alcuni specimens appartenuti alla familia Curie. Una delle vetrine è invece dedicata ai minerali sintetici.</div>
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L'orario di apertura è dalle 13h alle 18h, tutti i giorni esclusi martedì e festivi. Il prezzo del biglietto è di 5€, a meno che non presentiate una carta studentesca nel qual caso il costo si riduce a 3€. È invece gratuito per i bambini al di sotto dei 10 anni. Il museo si trova a pochi metri dalla bocca del metro di Jussieu, vicino la Sorbona.</div>
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Potete lasciare la macchina fotografica in albergo, infatti ahimè, non è permesso scattare foto. In compenso sono pubblicate sul sito internet (http://www.amis-mineraux.fr/) alcune foto delle vetrine, anche se in una risoluzione troppa ridotta per poter apprezzare i minerali.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9pXQnV4ja9kHIEcHw4YwZb6s89ItDFwdm2J8QQiXjFjCrj8hS9DBm15HG2D0uphxYM3RZVz1qaJ4tH7aLHGwzl9mfJ2Hz0mBXNs0quX9CGbPp0TGThosM5jOGKhw2hEbRkrlAJsyDYdEA/s1600/ajm0397-tourmaline-2008.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9pXQnV4ja9kHIEcHw4YwZb6s89ItDFwdm2J8QQiXjFjCrj8hS9DBm15HG2D0uphxYM3RZVz1qaJ4tH7aLHGwzl9mfJ2Hz0mBXNs0quX9CGbPp0TGThosM5jOGKhw2hEbRkrlAJsyDYdEA/s400/ajm0397-tourmaline-2008.jpg" width="265" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Tormalina su matrice di Mica</td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCXa3UlntM_NAQA3BaN5-AzTC9xSNC5RgsMMmNGpcbZmgcK_0iMxuQdAL8o2tatSl9ZW9ZJmts-q-6ZvPnOcNzwWf6srUQXMgLsvMpz4E5XQToA2aEeMWEIdkjZE_u4df74HKlZeOXJLtM/s1600/phoca_thumb_l_A_Na3Or007.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="335" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgCXa3UlntM_NAQA3BaN5-AzTC9xSNC5RgsMMmNGpcbZmgcK_0iMxuQdAL8o2tatSl9ZW9ZJmts-q-6ZvPnOcNzwWf6srUQXMgLsvMpz4E5XQToA2aEeMWEIdkjZE_u4df74HKlZeOXJLtM/s400/phoca_thumb_l_A_Na3Or007.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Oro su matrice</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkbAZdTNaOK6PaKWHU6zlQV_mVIMVV__2ZtJS1ewB3dz61wL0FKMVV-mWU0TFEZ1i-VAH96at455eYtlJt1svb9gyw63jugS_lOouDb1GDvhNx7dVyNOVXdM30u0EOFALb6tcpmSovnT4K/s1600/phoca_thumb_l_A_Ne30Staurolite936x.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="265" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhkbAZdTNaOK6PaKWHU6zlQV_mVIMVV__2ZtJS1ewB3dz61wL0FKMVV-mWU0TFEZ1i-VAH96at455eYtlJt1svb9gyw63jugS_lOouDb1GDvhNx7dVyNOVXdM30u0EOFALb6tcpmSovnT4K/s400/phoca_thumb_l_A_Ne30Staurolite936x.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Staurolite, formando una croce geometricamente perfetta.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhQOTnI91vWuI-5-98OCcTfFDwS1Yfj6aghKkmL99mXMrXliPP-wHWoVA3Y8MlYZzYat1AiR8a8eh5JXS7ndtEVBmpm4DzXa27JcxTdQmQ_G8wllL4XLgLrXItFwKz4GYbq9Ziv3c16YFZ/s1600/phoca_thumb_l_A_Ox27Goethite337x.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="265" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhhQOTnI91vWuI-5-98OCcTfFDwS1Yfj6aghKkmL99mXMrXliPP-wHWoVA3Y8MlYZzYat1AiR8a8eh5JXS7ndtEVBmpm4DzXa27JcxTdQmQ_G8wllL4XLgLrXItFwKz4GYbq9Ziv3c16YFZ/s400/phoca_thumb_l_A_Ox27Goethite337x.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Bell'esemplare di Goethite globulare</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijB5LUqPV1l1ImNWGeOPLC5aM7E0pH9lKLISnAF1TruFTShxoFVvwFvMX0tY-aW_YRe_anrCDU9ZJLbhEATeTKAiYVhTLlLXlK2LUaSWKquMHpw7kd2Rw6WTHBr-LRwxpCfF32xw-T4-JU/s1600/phoca_thumb_l_A_Te23Mordenite011.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijB5LUqPV1l1ImNWGeOPLC5aM7E0pH9lKLISnAF1TruFTShxoFVvwFvMX0tY-aW_YRe_anrCDU9ZJLbhEATeTKAiYVhTLlLXlK2LUaSWKquMHpw7kd2Rw6WTHBr-LRwxpCfF32xw-T4-JU/s320/phoca_thumb_l_A_Te23Mordenite011.jpg" width="288" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Mordenite globulare</td></tr>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-50156916181227639552013-06-09T16:37:00.001+01:002013-06-09T21:04:56.276+01:00Lo smeraldo Moghul<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9WwU0T8lCOCWG9dJ1Bd72fxNtxahbHmDZIjPGgPSbHsFLeIDqYpVvuz4xibBSuJ3doRmlSayfRdIDR1ZRPaOiYfZT9rXG1rk4zzXqhnlzJ7NSLgXsu1_21i7XS7YPGA6O8uD0cXYIBNi5/s1600/carvedemerald.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="258" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi9WwU0T8lCOCWG9dJ1Bd72fxNtxahbHmDZIjPGgPSbHsFLeIDqYpVvuz4xibBSuJ3doRmlSayfRdIDR1ZRPaOiYfZT9rXG1rk4zzXqhnlzJ7NSLgXsu1_21i7XS7YPGA6O8uD0cXYIBNi5/s640/carvedemerald.jpg" width="640" /></a></div>
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Lo smeraldo <i>Moghul</i> è uno dei più grandi smeraldi qualità gemma esistenti, misurando 10 centimetri d'altezza e pesando 217 carati. Fu ritrovato in Colombia e fece il giro del mondo prima di essere venduto a un ricco sovrano dell'impero Mogul dell'India. Ciò che rende veramente unico questo gioiello sono le sue iscrizioni,<i> </i>datate 1695, che rappresentano un testo di preghiera su un lato e un disegno floreale sull'altro.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiybtwtawCLEnr_MqoEYrLZt_Os8TYFO0PmjzSwhejXCMaqGGi4oryNWXgfHg4y3kqro9V7NncHzHOPvIfEIlwzgLCU8hCrnyKoSiniXbAVx98J8j9L608MIZltF2DBPTizwFB5GXOIHlak/s1600/Mogulemerald.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiybtwtawCLEnr_MqoEYrLZt_Os8TYFO0PmjzSwhejXCMaqGGi4oryNWXgfHg4y3kqro9V7NncHzHOPvIfEIlwzgLCU8hCrnyKoSiniXbAVx98J8j9L608MIZltF2DBPTizwFB5GXOIHlak/s640/Mogulemerald.jpg" width="459" /></a></div>
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Questa gemma è una dimostrazione del grande livello culturale, letterario e artisitico che si era raggiunto durante il periodo Moghul in India. L'arte di lapidare e intarsiare smeraldi e altre pietre fu perfezionata moltissimo in quegli anni e a provarlo resta il <i>Mogul Mughal,</i> che fu venduto nel 2001 per quasi 2,3 milioni di dollari a un anonimo. A partire dal 2008 è possibile ammirare questa pietra nel museo di arte islamica del Qatar.<br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5zeX39kKTiwxlLSj_VFKxAjoR3N7z0ApzSc7n1RbTN36Rjku8BtQQRO2DiiXjl52aWo-nWOJr_CoGitOjC9IXvTdwzS7a-q2XWvjT8GpUzGB3Jx6JPgNg_BJPq-ypHKuTRWWLt8aAPaEe/s1600/taj-majal.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5zeX39kKTiwxlLSj_VFKxAjoR3N7z0ApzSc7n1RbTN36Rjku8BtQQRO2DiiXjl52aWo-nWOJr_CoGitOjC9IXvTdwzS7a-q2XWvjT8GpUzGB3Jx6JPgNg_BJPq-ypHKuTRWWLt8aAPaEe/s400/taj-majal.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Taj Majal, un altro celebre esempio del livelli artistico raggiunto sotto il<br />
dominio Moghul in India.</td></tr>
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Abul Muzaffar Muhi-ud-Din Mohammad Aurangzeb, il sovrano che acquistò lo smeraldo bruto e lo fece indidere con la preghiera estratta dal corano, oltre a essere stato un pio musulmano fu anche l'ultimo imperatore della dinastia Moghul che per oltre due secoli dominò gran parte del sub-continente indiano. Durante la sua vita, l'impero raggiunse il suo massimo splendore, riuscendo a espandere i suoi possedimenti a oltre 3,2 Lm quadrati e governare una popolazione stimanta tra i 100 e i 150 milioni di abitanti.<br />
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<tr><td><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivwRfjbRgvhSya_lNP_wXM_lw8YEIWFp3n-BCQDVw2XVa-BdCWEtSCWFeq5IwF_Lj3O4gCn0H243q2wVOoMFA4FWYdpze5koizKw0CgQTH5Pt7l14E1BC58yxd6OrTGO-5djuOB1PGjPnc/s1600/mogul.tiff" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="280" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivwRfjbRgvhSya_lNP_wXM_lw8YEIWFp3n-BCQDVw2XVa-BdCWEtSCWFeq5IwF_Lj3O4gCn0H243q2wVOoMFA4FWYdpze5koizKw0CgQTH5Pt7l14E1BC58yxd6OrTGO-5djuOB1PGjPnc/s400/mogul.tiff" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px;">Bandiera dell'Impero Moghul.</td></tr>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-48674560601349412382013-06-02T22:45:00.003+01:002013-06-02T22:47:04.852+01:00Los ópalos harían sentirse como en casa a los marcianos<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL59LQWNNZST3_nFf_ty0EWgqJ4CV7UKdLGqGMA7l6aIb9PjUhKYDKpAGj8PrjWO0XxlRaGun9FG0XXroZYfyHfflf59Z2lWqZ2jWbbZGbTcy8-6POBaq7syjhOIhbllRBWKTBs43MgRUb/s1600/opal-gem.gif" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiL59LQWNNZST3_nFf_ty0EWgqJ4CV7UKdLGqGMA7l6aIb9PjUhKYDKpAGj8PrjWO0XxlRaGun9FG0XXroZYfyHfflf59Z2lWqZ2jWbbZGbTcy8-6POBaq7syjhOIhbllRBWKTBs43MgRUb/s400/opal-gem.gif" width="372" /></a></div>
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Si los marcianos llegasen a la tierra escogerían como hogar la region central de Australia. Es esta la opinion de <a href="http://usyd.academia.edu/PatriceRey/Papers">Patrice Rey</a>, un profesor asociado de la Universidad de Sidney, que en su artigo <i><a href="http://www.tandfonline.com/doi/full/10.1080/08120099.2013.784219#.UauufWQRDPx">Opalisation of the Great Artesian Basin: an Australian story with a Martian twist</a> (</i>Opalización de la gran cuenca artesiana: una historia australiana con un toque marciano) muestra una serie de analogias entre la superficie del planeta rojo y la zona geologica que incluye gran parte del Queensland.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYKuJE0mshk-WRe2BSAKYM1-IoENCYY-VpHNY7CYAvdNy8umoIVX1pM4ZH4RYjlvQtfWb4abcHF3M8JghZMQhOmqIq0UwZ1emDAy1u3NkbHl6PG7e41SzdP6JKYRw6Ad7KioxpF7cIzmI9/s1600/artesian.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgYKuJE0mshk-WRe2BSAKYM1-IoENCYY-VpHNY7CYAvdNy8umoIVX1pM4ZH4RYjlvQtfWb4abcHF3M8JghZMQhOmqIq0UwZ1emDAy1u3NkbHl6PG7e41SzdP6JKYRw6Ad7KioxpF7cIzmI9/s400/artesian.png" width="375" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Una mapa que muestra la localización de la "gran cuenca Artesiana"</td></tr>
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En su articulo explica como la inusual meteorización haya llevado a la formación del precioso ópalo, la piedra nacional australiana, que ha sido minada por más de un siglo. El porque de que el 95% de las formaciones de ópalos a bajas profundidades en el mundo se encuentren en esta zona de Australia es un misterio hasta hoy.</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTXEb1qe9IJdeJBgRCkOl5GF6xFNcvDnpeYTnnHCGpKbhv3bNq1zPD2Mq4lefWNMsCqUoppCoLzEfoIBaDSJrSHDCJ-8tU64NG4twvpUxFg4SAI3hwtSLJffHXYFRzEYXZqejm3yBZS4kW/s1600/opals-would-make-martians-feel-at-home-in-australia-study-300x250.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="333" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgTXEb1qe9IJdeJBgRCkOl5GF6xFNcvDnpeYTnnHCGpKbhv3bNq1zPD2Mq4lefWNMsCqUoppCoLzEfoIBaDSJrSHDCJ-8tU64NG4twvpUxFg4SAI3hwtSLJffHXYFRzEYXZqejm3yBZS4kW/s400/opals-would-make-martians-feel-at-home-in-australia-study-300x250.jpg" style="cursor: move;" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="font-size: 13px; padding-top: 4px; text-align: center;">Un tipico paisaje de la cuenca.</td></tr>
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Patrice Rey tenta dar una respuesta a esta cuestión explicando como la retirada del mar de Eromanga, un espejo de agua que cubría buena parte del continente australiano y que ha tenido lugar 110 millones de años atras, haya causado un extraordinario episodio de meteorización acida. El mar de Eromanga era poco profundo, frio, mal conectado a los oceanos, embarrado y estancado, con lo cual se explica la falta de carbonatos. Como resultado minerales piriticos, otros ricos en hierro así como feldespatos, rocas y ceniza vulcanica soltaron acido sulfúrico y dieron origen al ópalo a través de la meteorización acida.</div>
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Se trata de la sola zona al mundo donde un evento de este tipo y en esta proporción ha tenido lugar. La unica otra area conocida con condiciones geológicas similares es la superficie de Marte. De hecho en 2008 la Nasa ha descubierto depósitos de ópalo en el planeta rojo.</div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3oaXeV83c3oMaPA70Bkh4SNSYEMX6E_6SU3nMNf0Wm1bWjws-zgHCBFt3JpeNkCQmZtryMKKgljKseGMp1D2FRMECTdYbnmfDnHhBRml-f9jHP0L16VIOfw9DDd8m0wIfU-bX4bcOjOHd/s1600/martian_opals.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="285" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh3oaXeV83c3oMaPA70Bkh4SNSYEMX6E_6SU3nMNf0Wm1bWjws-zgHCBFt3JpeNkCQmZtryMKKgljKseGMp1D2FRMECTdYbnmfDnHhBRml-f9jHP0L16VIOfw9DDd8m0wIfU-bX4bcOjOHd/s400/martian_opals.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Mapa de la Nasa que indica el sitio de hallazgo de depósitos de ópalo en Marte.</td></tr>
</tbody></table>
</div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-54396426558072214262013-05-25T19:23:00.001+01:002013-05-26T23:43:00.607+01:00"Delle pietre preziose e delle pietre fine" di Luigi Dutens<div class="separator" style="clear: both; text-align: center;">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJGpXghoea7vCR5RurXFjbYr80_ydym1ZqM-8BzZrHYqo54mLNMqHRh8laZ_qXAOyOlP-V7C9PqgQzNXS_ZrJZTx7cQDiIdWi4TSBKWV8XAvdpuA0-EAPbz0aKaJtwyD5jHPbVrV02j5c6/s1600/foto00083.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJGpXghoea7vCR5RurXFjbYr80_ydym1ZqM-8BzZrHYqo54mLNMqHRh8laZ_qXAOyOlP-V7C9PqgQzNXS_ZrJZTx7cQDiIdWi4TSBKWV8XAvdpuA0-EAPbz0aKaJtwyD5jHPbVrV02j5c6/s320/foto00083.jpg" width="272" /></a></div>
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Eccoci arrivati al quarto appuntamento della rubrica sui libri antichi di gemmologia. Il volume che ho selezionato questa volta si intitola "<i>Delle pietre preziose e delle pietre fine" </i>e fu scritto nel 1780 da<i> </i>Luigi Dutens, membro della società reale di Londra e della accademia di belle arti di Parigi. </div>
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Si tratta di un tomo estremamente interessante e comprensibile. Quindi non mi resta che augurarvi una buona lettura!</div>
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LINKS:<br />
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<ol>
<li><a href="https://docs.google.com/file/d/0B3zztdXv21LzVy1jeERhcVpPSzQ/edit?usp=sharing">Tomo I</a></li>
<li><a href="https://docs.google.com/file/d/0B3zztdXv21Lza0p3dUc1RjJPaE0/edit?usp=sharing">Tomo II</a></li>
<li><a href="https://docs.google.com/file/d/0B3zztdXv21LzMVRKV05XSzItMUU/edit?usp=sharing">Tomo III</a></li>
</ol>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-43100381412777576922013-05-21T21:08:00.001+01:002013-05-21T21:36:48.727+01:00Mikimoto, il coltivatore di perle<div class="separator" style="clear: both; text-align: center;">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf3Ar0FFe3DjvZa1deUMiUnwGZ8YgBozq7V0Og89AouqTPFXytq-Sk9NCmVaqEhGqdaZ4psDVDJj5PaTS9MIArbD3mUY9t5r6qrGk47Lc_aTPi_iqEC0ou9R4uBWN49SXo9Hk_hS_dP1ef/s1600/mikimoto_1_kokichi_mikimoto.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="360" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgf3Ar0FFe3DjvZa1deUMiUnwGZ8YgBozq7V0Og89AouqTPFXytq-Sk9NCmVaqEhGqdaZ4psDVDJj5PaTS9MIArbD3mUY9t5r6qrGk47Lc_aTPi_iqEC0ou9R4uBWN49SXo9Hk_hS_dP1ef/s640/mikimoto_1_kokichi_mikimoto.jpg" width="640" /></a></div>
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Kokichi Mikimoto è stato un grande imprenditore, pioniere nel campo della coltivazione delle ostriche perlifere. Nel post di oggi vi parlerò della vita e della
traiettoria professionale di questa persona, che iniziando come venditore di verdure è arrivato a ricevere l'Ordine del Sacro Tesoro, la più grande onorificenza che un cittadino giapponese possa ricevere dall'imperatore. </div>
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Mikimoto nacque il 25 gennaio del 1858 <span style="text-align: justify;">a Toba, una piccola cittadina che si affaccia sulla baia di Ise,</span> e per riuscire a "creare" una perla ha dimostrato una eccezionale tenacità, affrontando ripetuti fallimenti fino a raggiungere il suo traguardo. </div>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlQIml1pKn3MpYLjsfynBN9f0VZ_RSAqaBrJDiOsYXvrC6FClTqM4ODWoUbUXBODu-Tf23Xa1x_qEWyIyZ2Si3IJpTMU41qp7qGpcxGh4Kwnp6Ptu-RwQ9nyr5BeuJ_xg5-6SHNGglTN-S/s1600/CIMG1018.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjlQIml1pKn3MpYLjsfynBN9f0VZ_RSAqaBrJDiOsYXvrC6FClTqM4ODWoUbUXBODu-Tf23Xa1x_qEWyIyZ2Si3IJpTMU41qp7qGpcxGh4Kwnp6Ptu-RwQ9nyr5BeuJ_xg5-6SHNGglTN-S/s640/CIMG1018.JPG" width="480" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Il principe Carlo e la principessa Sofia, oggi re e regina di Spagna, visitano la sede della<br />
Mikimoto Pearl. La foto fu scattata il 23 gennaio 1972.</td></tr>
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Le perle naturali nascono a causa dell'intrusione nella conchiglia (bivalve e gastropodi, che tecnicamente non sono ostriche) di un elemento esterno, per esempio un granello di sabbia. Non potendo espulsare questo "intruso", il sistema difensivo del mollusco lo riveste con uno strato di carbonato di calcio e conchiolina, un materiale più comunemente conosciuto con il nome di madre perla, che riveste la parte interna della conchiglia.<br />
La coltivazione di perle artificiali si basa proprio su questo processo che sfrutta la reazione naturale anti-irritante del mollusco: vengono introdotte all'interno della conchiglia sfere ricavate tagliando di conchiglie di fiume oppure di plastica e piccole parti di epitelio dello stesso mollusco tagliato.</div>
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Dopo alcuni mesi all'interno della ostrica, le sfere vengono ricoperte da vari strati di madre perla e a causa della forma perfetta di queste le perle artificiali hanno una rotondità e una stratificazione migliore rispetto a quelle prodotte in natura.<br />
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaqDujjY6gtWkNq680YXMz5TzEHLoufwwNKZhFHA_pnS6myygIdOflWpbAwrZaxh0LNZG3uXof8oDVcRs6q-9UD8ofEDUJmwQiRuG48IthVnDBywnf3mEY3_1SGlNJtMS-71Uihc8tuMZo/s1600/CIMG1001.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhaqDujjY6gtWkNq680YXMz5TzEHLoufwwNKZhFHA_pnS6myygIdOflWpbAwrZaxh0LNZG3uXof8oDVcRs6q-9UD8ofEDUJmwQiRuG48IthVnDBywnf3mEY3_1SGlNJtMS-71Uihc8tuMZo/s400/CIMG1001.JPG" width="300" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Statua di Mikimoto presso Toba, Giappone.<br />
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Mikimoto non fu il primo, come invece molti credono, a studiare e usare questo processo naturale per creare perle coltivate, però sì fu pioniero nella creazione di un progetto di produzione e di commercializzazione in grande scala. </div>
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Abbiamo notizie di piccoli Buddha che venivano prodotti in Cina, introducendo miniature scolpite all'interno di molluschi, molti secoli prima che Mikimoto facesse la stessa cosa con piccole sfere in Giappone e nemmeno sapeva che in Australia, il biologo giapponese Tokishi Nishikawa e il falegname Tatsuhei Mise avevano ottenuto il segreto della produzione delle perle coltivate dal biologo britannico William Saville-Kent, prima che lui riuscisse a produrre il primo esemplare di perla semisferica.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQSPQiVvodOKsUp9wAgXTedWL3QYyNGRL_lbnz-0x-VpcRO-sFfsHgp9J0RmfdO7FaVbN2QIGEVMVExj0kI0J2pnqogQ3RBYEurNu8yRVhPu7XP05K0H_RSz2jLFLfd38FtWjCkkqc-0_I/s1600/mikimoto1.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="348" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQSPQiVvodOKsUp9wAgXTedWL3QYyNGRL_lbnz-0x-VpcRO-sFfsHgp9J0RmfdO7FaVbN2QIGEVMVExj0kI0J2pnqogQ3RBYEurNu8yRVhPu7XP05K0H_RSz2jLFLfd38FtWjCkkqc-0_I/s400/mikimoto1.jpg" width="400" /></a></div>
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Primo figlio di un piccolo commerciante di prodotti alimentari, Kokichi Mikimoto tenne che rinunciare agli studi molto giovane e iniziare a lavorare per contribuire attivamente al reddito familiare. La sua giovinezza coincide con la fine dell'epoca Edo in Giappone. Si trattava di un periodo di profondi cambiamenti che sconvolgono il paese del sol levante. In pochi anni, avvenne uno dei processi di mutazione economica e sociale più profondi nella storia dell'umanità che porta il Giappone "feudale" dei samurai a trasformarsi in un paese industriale con molti tratti "occidentali".</div>
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L'amore di Mikimoto per le perle inizia nel 1878, quando con soli 20 anni aiutò a organizzare un'esposizione nel suo paese natale. Nel corso di questo evento arrivò l'impulso che lo portera al successo. Infatti si rese conto che molte perle imperfette venivano vendute a un costo molto elevato. Inizia così una lunga storia di tentativi falliti di produrre perle artificiali. Nel 1888 ottenne un prestito e con l'aiuto della moglie Ume avvia una coltivazione di perle usando la varietà di bivalve conosciuta come Akoya (Pinctada martensiide fucata).</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjipiJITZqo5xnv7iJTl6ygzqe6LCZpxJow_yl5ynoXYPuixoBMBYx62FIPOd4wVCjFfpjfAJ84wKi95LQK7qDn43erFY4TZSea95Hm_183ogCScZbsb_Nl6y-WbkaYQDfDwBDjDB0FW4-2/s1600/akoya_15.gif" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="215" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjipiJITZqo5xnv7iJTl6ygzqe6LCZpxJow_yl5ynoXYPuixoBMBYx62FIPOd4wVCjFfpjfAJ84wKi95LQK7qDn43erFY4TZSea95Hm_183ogCScZbsb_Nl6y-WbkaYQDfDwBDjDB0FW4-2/s400/akoya_15.gif" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Sistema di coltivazione di perle.</td></tr>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC9Wo_TFHZE-6m49Uz5Cou3Ki1CArRKIysGQQmKU6MEufYiGXEujN60W7u9Qpgr99WtSXqU_OHNK4UlBfzSj37w0tE52Q7rUQlGIRgoAoNN_IbN3wBXv1ZYOK6nvqIQXKMH1ycS6jYg3EN/s1600/akoya_farm.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="117" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiC9Wo_TFHZE-6m49Uz5Cou3Ki1CArRKIysGQQmKU6MEufYiGXEujN60W7u9Qpgr99WtSXqU_OHNK4UlBfzSj37w0tE52Q7rUQlGIRgoAoNN_IbN3wBXv1ZYOK6nvqIQXKMH1ycS6jYg3EN/s400/akoya_farm.jpg" width="400" /></a></div>
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Dopo numerosi fallimenti e tentativi frustati causati oltre che dalla mancanza di esperienza anche dagli attacchi dei polpi e dalla marea rossa, che conteneva una specie di batteri mortali per le ostriche, l'11 di giugno del 1893 riesce finalmente a ottenere la prima perla semisferica. Nel 1899 apre il primo negozio a Ginza, nel centro di Tokyo. Nel 1905 riesce a coltivare la prima perla sferica rotonda. Nel 1907 fonda il laboratorio orafo Mikimoto. Nel 1913 apre il primo negozio a Londra.</div>
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Nel 1914 avvia la prima coltivazione nei mari del sud, presso l'isola di Ishigaki e nel 1931 ottiene una perla nera di 10mm. Nel 1927 incontra Thomas Edison. Resta celebre la frase che l'inventore americano gli rivolge: "Ci sono solo due cose che non potrei creare nel mio laboratorio: perle e diamanti". Nel 1930 venne invitato al palazzo imperiale giapponese dove riceve il riconoscimento come uno dei 10 più grandi inventori giapponesi.</div>
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Il 21 settembre 1954 Kokichi Mikimoto si spegne alla veneranda età di 96 anni.</div>
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Ecco alcune delle opere d'arte realizzate con le sue perle:</div>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsvU-FtEiyfovhCJ26G224reWDzzshMn4LWULUf1UukOOmvMRvbDbBptsHXz7vDLO7LnvDcynPqdcNNvC73TTvGXT8Sp4cLiqd7Pm839fI-k-GtO-zCBbcTdLcsUsR1Yu5OIwWeqsEW4Hn/s1600/1937_yaguruma_400x300.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsvU-FtEiyfovhCJ26G224reWDzzshMn4LWULUf1UukOOmvMRvbDbBptsHXz7vDLO7LnvDcynPqdcNNvC73TTvGXT8Sp4cLiqd7Pm839fI-k-GtO-zCBbcTdLcsUsR1Yu5OIwWeqsEW4Hn/s400/1937_yaguruma_400x300.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Yaguruma, un fermaglio che può assumere 12 diverse posizioni.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz4je1dLWNzI0DHVaoifM7o0B8iBT7-GQRtOO9VXfAyZkU_9O_99npqdpUG90OFDlg0JkVslWhkQco1Lm3jtKl7-kDmQc5gVK7YY9MbDcC9NanUXM_Bgj6Da4tdDh4k2a3ZFyFk0C7jBfS/s1600/liberty-bell.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhz4je1dLWNzI0DHVaoifM7o0B8iBT7-GQRtOO9VXfAyZkU_9O_99npqdpUG90OFDlg0JkVslWhkQco1Lm3jtKl7-kDmQc5gVK7YY9MbDcC9NanUXM_Bgj6Da4tdDh4k2a3ZFyFk0C7jBfS/s400/liberty-bell.jpg" width="285" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">La "Million dollar Bell", composta da 12.250 perle e 366 diamanti.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqV7YA80KkFpx_2_jWEI4QVXSC3dZnFwwGX5tfspJtynj3N1hS_-HpjaMua-T1oZGt1BQnpvnUeD6IRgnUCxd2oDlZNG3I4aY0iqKQuknlgkyhy5VU-q4M5P6KEzPuHcUzHW7zXRqDjrnH/s1600/DSC00739.JPG" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqV7YA80KkFpx_2_jWEI4QVXSC3dZnFwwGX5tfspJtynj3N1hS_-HpjaMua-T1oZGt1BQnpvnUeD6IRgnUCxd2oDlZNG3I4aY0iqKQuknlgkyhy5VU-q4M5P6KEzPuHcUzHW7zXRqDjrnH/s400/DSC00739.JPG" width="300" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Pagoda di cinque piani ricoperta di perle.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9BX36zxJY4zCg_p9phsAKb2m4gE3SHg0Xz9Ym3_HHvGFBYRzQjO4qq2XCEGJ0RoiOMRYZzJvf_kT8bkfvjKNNubbiI8CY-0EXcEqtcK7FJlBntqw1HzDQ016r4sOq2Zx4-J_s4QJ1Ml_X/s1600/1969_debeers_400x300.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9BX36zxJY4zCg_p9phsAKb2m4gE3SHg0Xz9Ym3_HHvGFBYRzQjO4qq2XCEGJ0RoiOMRYZzJvf_kT8bkfvjKNNubbiI8CY-0EXcEqtcK7FJlBntqw1HzDQ016r4sOq2Zx4-J_s4QJ1Ml_X/s400/1969_debeers_400x300.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">"Prelude to space": gioiello realizzato nel 1969 in collaborazione con la De Beers.</td></tr>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmpeP0dFv4rJD6LIueGvuiSRM_sUhFN6f0iduzovhJaWSCjq6g4mIQyGRtA3lKKomFcXUsfHMqoOdsL9hQ31Ak5hMmGZ72Iun8RtuV7Brk2xCG7-Cg_S1o_IFvHUUTEHiy28TDxi5Yg9rD/s1600/6_castle_11.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmpeP0dFv4rJD6LIueGvuiSRM_sUhFN6f0iduzovhJaWSCjq6g4mIQyGRtA3lKKomFcXUsfHMqoOdsL9hQ31Ak5hMmGZ72Iun8RtuV7Brk2xCG7-Cg_S1o_IFvHUUTEHiy28TDxi5Yg9rD/s400/6_castle_11.jpg" width="392" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">Riproduzione del più grande castello giapponese che si trova a Himeji.</td></tr>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-74881190900804409462013-05-12T23:44:00.000+01:002013-05-13T00:24:42.466+01:00La Bixbita<div class="separator" style="clear: both; text-align: center;">
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El diamante es la piedra preciosa más dura pero sin dudas, a pesar de su precio, no es la más rara. Existen otros minerales presentes solo en pocos lugares de nuestro planeta y en una cantidad mínima, que cuando tallados originan gemas el cuyo precio supera el de los diamantes. </div>
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En el post de hoy de hoy hablaré de uno de estos minerales: la Bixbita.</div>
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La Bixbita es conocida también como "esmeralda roja" o "berilo rojo", su color puede variar de rosas a rojo intenso y se trata de una variedad de Berilo, la familia mineral compuesta de gemas nobles como la Aguamarina, la Esmeralda, el Heliodoro, la Goshenita y la Morganita. Su composición química es Be3 Al2 Si6 O18.<br />
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Su color se debe a la presencia de atomos de Manganeso (Mn2+) que actúan como agentes cromoforos y substituyen atomos de Aluminio (Al) en la estructura cristalina del mineral. La Bixbita es la variedad más rara de berilo y los minerales miden pocos milímetros y raras veces las gemas talladas superan el carate. El espécimen mayor que se ha encontrado hasta hoy pesa 54 carates mientras la gema más grande que ha salido de la <i>Ruby Violet Mine</i> pesa 8 carates.<br />
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El nombre bixbita deriva de <b>Maynard Bixby</b>, un famoso coleccionador de minerales americano que en el 1904 descubrió por la primera vez este mineral.<br />
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Esta pedra hasta hoy ha sido hallada unicamente en tres lugares de los Estados Unidos. El primero es la <i>Ruby Violet Mine</i>, una mina localizada en la montañas Wah Wah (Beaver County), el la zona centro meridional de lo Utah que hoy es propiedad de la KMC, controlada de la celebre empresa minera <i>Rio Tinto</i> de Londres y en la cual no es permitido el acesso de particulares. Los exemplares encontrados en esta area, que mide solamente 900 x 1900 metros cuadrados, son caracterizados por su color rojo-intenso extraordinario y por su matriz de <a href="https://es.wikipedia.org/wiki/Riolita">riolita</a>.<br />
El segundo yacimiento es localizado siempre en el estado de lo Utah pero esta vez en el desierto en su zona ovest, más específicamente en la cadena de montañas conocidas como <i>Thomas Range</i> y su pico <i>Topaz Mountain. </i>Este lugar es visitada cada año por millares de aficionados en busqueda de minerales semi-preciosos.<br />
El tercer yacimiento su encuentra en <i>Sierra County</i> en el estado de New Mexico, más específicamente en el <i>Paramount Canyon</i> e en la <i>Round mountain </i>ambos en <i>Taylor creek tin district</i>.<br />
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En el 2002 algunos piedras rosas fueron encontradas en Madagascar, y en un primero momento se pensaba fuesen Bixbita pero después de análisis de laboratorio se han clasificados como una nueva especie mineral conocida como Pezzottaíta, en homenaje a su descubridor, el geologo italiano Federico Pezzotta.<br />
Esta ultima calidad tiene un index de refraction compreso entre 1.601 y 1.620 mientras que el de la berilo rojo es de 1.567-1.580. El habito cristalino también es diferente: la Pezzotaíta se presenta en cristales trigonales (pseudo-hexagonales) con una terminación bipiramidal y en matriz de granito gris mientras la Bixbita se presenta el clásico <i>habitus</i> hexagonal del berilo con una terminación prismatica plana y normalmente tiene una matriz de Riolita.<br />
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<span style="font-size: x-small;">Fuentes: <a href="http://www.realgems.org/list_of_gemstones/red_beryl_info.html">realgems.org</a>, <a href="http://anamikas.hubpages.com/hub/Bixbite-Red-Beryl-Gemstone">anamikas.hubpages.com</a>, <a href="http://noospheregeologic.com/blog/2012/09/04/the-rare-gem-series-bixbite-red-berylred-emerald/">noospheregeologic.com</a>. <a href="http://noospheregeologic.com/blog/2012/09/04/the-rare-gem-series-bixbite-red-berylred-emerald/">noospheregeologic.com</a>.</span></div>
Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-31344269759589803942013-05-01T17:06:00.001+01:002013-05-09T00:45:48.605+01:00Los diez diamantes más grandes del mundo<div class="separator" style="clear: both; text-align: center;">
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Publico un interesante gráfico elaborado por la pagina web <a href="http://www.smykker.me/"><span class="s1">Smykker.me</span></a> que muestra los diez más grandes diamantes <u>tallados</u> que existen, empezando por el <i>Golden Jubilee</i> hasta llegar al <i>Millenium Star</i>, pasando por los dos <i>Cullinan</i> y muchos otros. A seguir podeis ler una breve historia de cada un de ellos.<br />
Se trata del primer post en español que escribo en mi blog y espero que me perdonarais mis errores de ortografia. Buena lectura!<br />
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<i><b>10°: The Millenium Star</b></i></div>
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Esta fantástica piedra de 203.04 carates es el décimo más grande diamante del mundo mientras se trata del segundo más grande se consideramos los que son clasificados como "D color". <i>The Millenium Star</i> fue descubierto en la República Democrática del Congo en el 1990 y la piedra bruta pesaba 777 carates. El diamante tallado fue exhibido al público por la primera vez en el 1999 como pieza principal de la <i>colección del milenio</i> de De Beers. Su valor es desconocido pero sabemos que fue asegurado por un valor de 100 millones de Esterlinas. </div>
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<i><b>9°: The Red Cross</b></i></div>
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<i>The Red Cross Diamond </i>es un diamante amarillo canario de 205.07 carates. En 1918 un grupo de filántropos vendió esta pedra en una subasta de Christie's y donó la ganancia en favor de la Cruz Roja. De este hecho deriva su nombre. </div>
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<i><b>8°: The De Beers</b></i></div>
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Poco tiempo después de la creación de la "De Beers Consolidated Mines Limites" en el marzo de 1888, fue hallado en la mina que la compañía explotaba un enorme diamante octaedrico amarillo claro. La piedra en bruto pesaba 428.5 carates mientras, después de la talla, la gema mayor nombrada <i>The De Beers</i>, pesando 234.65 se ha convertido en el séptimo más grade diamante del mundo</div>
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<i><b>7°: The Jubilee</b></i></div>
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Esta gema de 245.35 carates ha sido clasificada como color E (un grado menos de completamente incoloro) y con un brillo VVS2. Se trata, de consecuencias, de una piedra de extrema calidad que ha sido tallada de un diamante bruto de 650.8 carates métricos (una medida geológica antigua) y de forma octaedrica que fue hallado en 1895 en la <i>Jagersfontein Mine</i>, situada en un estado llamado <i>Orange Free State</i> que hoy en día hace parte de la república del Sudáfrica. </div>
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<i><b>6°: The Centenary</b></i></div>
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Al mismo tiempo que celebraba su año de actividad numero cien, la <i>De Beers</i> anunció el 11 de marzo de 1988 el hallazgo de una fabulosa piedra bruta incoloro de 599 en la Premier Mine. Lógicamente este diamante fue nombrado <i>The Century</i>, El Centenario. El trabajo de tallar este prodigio de la naturaleza fue encomendado a Gabi Tolkowsky. Solamente el estudio del diamante bruto tardo más de un año y durante una entrevista Tokowlsky dijo: "desde el momento que supe que iba a tallarla me he transformado en un otro hombre. Un hombre extraño. Estaba mirando a la piedra durante el día mientras la piedra me estaba mirando a mi durante la noche". El trabajo se hizo particularmente difícil por la numerosas fisuras, pero al final se llevo al cabo dando rigen a una maravillosa gema de 273.85 carates, que mide 39.90 × 50.50 × 24.55 mm, y tiene 247 facetas.</div>
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<i><b>5°: The Spirit of Grisogono</b></i></div>
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<i>The spirit of Grisogono</i> es el más grande diamante negro tallado del mundo. Su peso es de 587 carates y su creación de debe al joyero suizo De Grisogono. Actualmente se encuentra engastado en un anillo que incluye 702 diamantes blancos por un peso total de 36.7 carates.</div>
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<i><b>4°: The Culligan II</b></i></div>
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En la cuarta posición encontramos el <i>Cullinan II, </i>que es la segunda gema más grande de las 150 gemas que se obtuvieron del Cullinan, un diamante de 3106 carates que fue hallado en Sudáfrica. Este diamante hoy en dia se encuentra engastado en la corona imperial británica.<br />
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<b>3°: <i>The incomparable</i></b></div>
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El incomparable es un diamante amarillo-marrón sin inclusiones que pesa 407.48 carates tallado en forma de escudo. La piedra bruta, que pesaba 890 carates, fue descubierta por una joven que la encontró en una pila de escombros cerca de la MIBA Diamond Mine en la República Democrática del Congo. El tio de la joven vendió la piedra a un grupo de compradores que lo hicieron tallar dando origen a 91 diamantes.</div>
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<i><b>2°: Cullinan I</b></i></div>
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Es conocido también como Great Star of Africa (Grande Estrella de Africa) y ha sido el más grande diamante desde el 1908, año de su lapidación hasta el 1987, año el cual el primado le fue quitado por el Golden Jubilee. El diamante bruto pesaba 3106.75 carates (más de 600 gramas) y fue hallado el 25 de enero de 1905 en la Premier Diamond Mining Company. Su nombre deriva del nombre del dueño de la mina: Thomas Cullinan. La piedra em bruto fue donada al Rey Eduardo VII que la hice tallar obteniendo 150 gemas y siendo la más grande el Cullinan I (530.2 carates) que actualmente se encuentra engastado en el <a href="http://en.wikipedia.org/wiki/Sceptre_with_the_Cross">Cetro de la Cruz</a>, una de las joyas de la corona británica.</div>
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<i><b>1°: The Golden Jubilee</b></i></div>
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Se trata del mayor diamante tallado que existe en el mundo. La piedra bruta que pesaba 755 carates fu descubierta en el 1985 en la <i>Premier Mine</i>, la misma mina situada en Sudáfrica que ha originado los <i>Cullinan I</i> y <i>II</i> y también <i>The Centenary. </i>Es curioso saber que tratándose de un diamante marrón, considerado por la mayoría de los expertos de calidad inferior, De Beers se lo dio a Gabriel Tolkowsky, para que probase nuevas técnicas de talla. El resultado de 2 años de trabajo han sido esta maravillosa gema, que fue comprada por el emperador de Thailandia y renombrada en homenaje a su 50° ano de reino.<br />
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<span style="font-size: x-small;">Fonti: <a href="http://famousdiamonds.tripod.com/">famousdiamonds.tripod.com</a>, </span></div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0tag:blogger.com,1999:blog-3521409024237886757.post-10645587110188455942013-04-24T17:37:00.002+01:002013-05-18T11:25:16.716+01:00L'Acquamarina di Dom Pedro<div class="separator" style="clear: both; text-align: center;">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNzfCVEnULJxNPI6FPk7cPtHYFwntb4gbXkVDcu1mFBoAwVCCie-aBG_xKZAHoWrEw8CHtTH_tHdYV7qmOTUS2VBgmhZGuf8PNTs1hA3-7k4wCjl046X_-AuyAgyYTbnOQnQ7CxFg6mx9S/s1600/dompedro-e1354563865390.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNzfCVEnULJxNPI6FPk7cPtHYFwntb4gbXkVDcu1mFBoAwVCCie-aBG_xKZAHoWrEw8CHtTH_tHdYV7qmOTUS2VBgmhZGuf8PNTs1hA3-7k4wCjl046X_-AuyAgyYTbnOQnQ7CxFg6mx9S/s1600/dompedro-e1354563865390.jpg" width="346" /></a></div>
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<i>L'Acquamarina di Dom Pedro</i>, pesando 10.363 carati, è il più grande esemplare tagliato esistente al mondo di questa varietà minerale dal colore del mare. Il nome di questo obelisco deriva dai primi due imperatori del Brasile, essendo infatti un omaggio a Dom Pedro I e Dom Pedro II. </div>
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La sua forma e le caratteristiche faccette interne rendono questo gioiello, scolpito da Bernd Munsteiner, assolutamente unico, come se non bastasse il fatto che il minerale bruto originale dal quale è stato lapidato pesava circa 45 Kg e era alto 91 cm.</div>
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Alla fine degli anni '80, un eccezionale esemplare di Acquamarina fu ritrovato da tre minatori nella località brasiliana di Pedra Azul, nello stato di Minas Gerais. Il minerale che raggiungeva quasi un metro di altezza fu rotto, si crede accidentalmente, in tre parti.<br />
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Queste tre pezzi vennero acquistati da un anonimo commerciante di pietre preziose brasiliano che le cedette in seguito a un consorzio capitanato da Bernd Munsteiner e Jurgen Henn, due commercianti di Idar-Oberstein, capitale tedesca delle pietre preziose, e appoggiato dalla Gebrüder Bank. Non si tattò di una verra e propria vendita, infatti come vedremo in seguito il commerciante brasiliano rimaneva co-proprietario della pietra.<br />
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Altre caratteristiche straordinarie del cristallo di Acquamarina erano il suo colore e la sua trasparenza compromessa solo da poche e strette inclusioni a forma di ago che si possono tuttora vedere nella base dell'obelisco.<br />
Trattandosi del più grande cristallo di questo tipo mai ritrovato al mondo Bernd Munsteir, incaricato della sua lavorazione, si prese 4 mesi solo per lo studio preliminare. Numerosi schizzi e progetti furono preparati per raggiungere il migliore risultato possibile.<br />
Per la lapidazione furono invece necessari 6 mesi. Le striature artificiali che accompagnano il cristallo per tutta la sua lunghezza, sono scolpite sulla sua superficie posteriore e sono state studiate per far brillare il cristallo dal suo interno.<br />
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L'Acquamarina di Dom Pedro fu esposta in molteplici fiere in tutto il mondo, dimostrando il suo innovativo stile di taglio, ma alla fine degli anni '90 il commerciante brasiliano co-proprietario decise di ricapitalizzare il suo investimento e la maniera più lucrativa per farlo era quello di vendere l'obelisco tagliato in molte piccole gemme.<br />
Per evitare che questo avvenisse Jane Mitchell e suo marito Jeffery Bland decisero di acquistarla nel 1999 e di donarla nel 2011 al Smithsonian Institute di Washigton D.C., dove ancora oggi è possibile ammirare questo gioiello.<br />
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<span style="font-size: x-small;">Fonti: <a href="http://mineralsciences.si.edu/collections/dom-pedro/history.htm">mineralsciences.si.edu</a></span></div>
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Anonymoushttp://www.blogger.com/profile/16155011700435799175noreply@blogger.com0