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https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=19&t=24453
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Author:  GTP Bill [ Thu May 10, 2018 10:32 am ]
Post subject:  Win a FREE Download of GT Pro!

Haven't done this in ages. The first person to ID this gemstone will win a free download of Gemology Tools Professional.
Clues:
1) Transparent
2) Colorless
3) High RI: 1.65
4) Low RI: 1.49
5) SG: 2.20

Author:  1bwana1 [ Thu May 10, 2018 11:55 am ]
Post subject:  Re: Win a FREE Download of GT Pro!

Whewellite?

Author:  GTP Bill [ Thu May 10, 2018 12:05 pm ]
Post subject:  Re: Win a FREE Download of GT Pro!

Well, that didn't take long! Must have been too easy.

Author:  GTP Bill [ Thu May 10, 2018 12:07 pm ]
Post subject:  Re: Win a FREE Download of GT Pro!

Whewellite is correct! 1bwana1 wins a GT Pro download!

Author:  1bwana1 [ Thu May 10, 2018 12:48 pm ]
Post subject:  Re: Win a FREE Download of GT Pro!

The most consistent property in gemmology is birefringence. This one was unique, and led me straight to the answer. Very obscure stone to be sure, but I have personally passed one in the past. LOL. :?

Thanks for your support of the industry and the forum. Know that it is appreciated.

Steve

Author:  Barbra Voltaire, FGG [ Thu May 10, 2018 2:46 pm ]
Post subject:  Re: Win a FREE Download of GT Pro!

Steve that is a brilliant and accurate fact!
Birefringence is as important as refractive index!

Just as a sidebar, I use Gemology Tools Pro everyday,
If you don't have a copy, get one!

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