Calaveras Gem & Mineral Society

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News:

CGMS Gem & Jewelry Show - March 23 - 24, 2019

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  Subject Started by Replies Views Last post
Mohs Scale of Hardness Andrew 1 116 Last post May 04, 2019, 02:06:55 pm
by AltonErurf
Seven Key Characteristics of Rocks and Minerals Andrew 0 50 Last post February 19, 2019, 01:27:15 pm
by Andrew
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