conoscopy explained

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cascaillou
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conoscopy explained

Post by cascaillou »

http://jm-derochette.be/conoscopy.htm
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Barbra Voltaire, FGG
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Re: conoscopy explained

Post by Barbra Voltaire, FGG »

The Gemology Project does a good job explaining as well:
http://www.gemologyproject.com/wiki/ind ... olariscope
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