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<p>[QUOTE=&quot;Miscstuff, post: 859053, member: 1331&quot;]Learning how to test is like any hobby - antiques - astronomy - restoration etc it take time and experience. These days you can buy some quite cheap analytical gear like refractometers and polariscopes etc on eBay ..</p><p><a href="https://www.ebay.com/itm/Gem-Refractometer-1-30-1-81-RI-Gemological-Gemstone-with-LED-Light-Source-Tools/113697252549?hash=item1a78e264c5:g:aSIAAOSwwKhcmJrh" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ebay.com/itm/Gem-Refractometer-1-30-1-81-RI-Gemological-Gemstone-with-LED-Light-Source-Tools/113697252549?hash=item1a78e264c5:g:aSIAAOSwwKhcmJrh" rel="nofollow">https://www.ebay.com/itm/Gem-Refractometer-1-30-1-81-RI-Gemological-Gemstone-with-LED-Light-Source-Tools/113697252549?hash=item1a78e264c5:g:aSIAAOSwwKhcmJrh</a></p><p>and also</p><p><a href="https://www.ebay.com/itm/Polariscope-Portable-Handheld-LED-Flashlight-Torch-Gem-Gemstone-Testing-Tool/122583291374?hash=item1c8a8895ee:g:vAwAAMXQAMlRYQMf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ebay.com/itm/Polariscope-Portable-Handheld-LED-Flashlight-Torch-Gem-Gemstone-Testing-Tool/122583291374?hash=item1c8a8895ee:g:vAwAAMXQAMlRYQMf" rel="nofollow">https://www.ebay.com/itm/Polariscope-Portable-Handheld-LED-Flashlight-Torch-Gem-Gemstone-Testing-Tool/122583291374?hash=item1c8a8895ee:g:vAwAAMXQAMlRYQMf</a></p><p><a href="https://www.ebay.com/itm/Pro-Gem-Table-Top-Polariscope-With-Gem-Clip-Black-NEW/303068019617?hash=item469042fba1:g:-ZwAAMXQKQhRG5hM" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.ebay.com/itm/Pro-Gem-Table-Top-Polariscope-With-Gem-Clip-Black-NEW/303068019617?hash=item469042fba1:g:-ZwAAMXQKQhRG5hM" rel="nofollow">https://www.ebay.com/itm/Pro-Gem-Table-Top-Polariscope-With-Gem-Clip-Black-NEW/303068019617?hash=item469042fba1:g:-ZwAAMXQKQhRG5hM</a></p><p>and you find the data all over the net</p><p><a href="https://www.gemsociety.org/article/table-refractive-index-double-refraction-gems/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.gemsociety.org/article/table-refractive-index-double-refraction-gems/" rel="nofollow">https://www.gemsociety.org/article/table-refractive-index-double-refraction-gems/</a></p><p>Also googling &quot;gemstone inclusions&quot; helps ID stones.</p><p>Then you join a gemology forum and ask questions about identification problems you might have. You are also allowed to drool over some the gems shown by members.</p><p><a href="https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=61&amp;sid=19262c507cc64bcbb31454f92c62100f" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=61&amp;sid=19262c507cc64bcbb31454f92c62100f" rel="nofollow">https://www.gemologyonline.com/Forum/phpBB2/viewforum.php?f=61&amp;sid=19262c507cc64bcbb31454f92c62100f</a></p><p>As for myself I did 99% of the &quot;Colored gemstone&quot; course at the Gemological Institute of America&quot; in the late 1980s but ran out of money and had to come home. This was before they went bust and were bought out by the jewelry industry and all the settings they referred to as fraudulent and deceptive were removed from the curriculum and replaced by &quot;legitimate&quot; trade names.</p><p>It&#039;s not rocket science but like all hobbies it take time to learn.</p><p>Hope this helps</p><p>Cheers</p><p>Stephen[/QUOTE]</p><p><br /></p>

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