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Barbra Voltaire, FGG
 Post subject: SF Gem and Mineral Society: Virtual Turquoise Lecture
PostPosted: Thu Oct 14, 2021 3:56 pm 
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Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21546
Location: San Francisco
Quote:
Turquoise has been historically used as jewelry and as a decorative stone in many places around the world. From Egypt to the Mesomericas, and most famously Persia, turquoise has held significance in our culture throughout history. American turquoise, found in the Southwest of the US, is no exception, and is one of the most famous localities for turquoise. Turquoise is found near copper deposits, usually forming intertwined in matrix. However, in some rare circumstances, turquoise sometimes can be found crystallized in very small sharp crystals or formed botriyoidally.


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