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CCMGS 75th Anniversary Mineral & Gem Show
November 8 - November 9
JOIN US for the Contra Costa Mineral & Gem Society’s 75th ANNIVERSARY MINERAL & GEM SHOW November 8-9, 2025! Come enjoy a rockin’ weekend full of affordable family FUN, holiday shopping, and educational experiences for ALL AGES! Come celebrate 75 years with us, and see what is NEW this year!
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