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OFFICIAL WEBSITE FOR THE
CONTRA COSTA MINERAL & GEM SOCIETY
OFFICIAL WEBSITE FOR THE
CONTRA COSTA MINERAL & GEM SOCIETY
WHO GETS IN FREE AT THE DOOR? First Responders In Uniform + Youth Organizations In Uniform (No tickets necessary)
Upcoming Events
CCMGS Annual Gem & Mineral Show 2026Nov 14, 2026, 10:00 AM – 5:00 PM PSTCentre Concord, 5298 Clayton Rd, Concord, CA 94521, USA
CCMGS Annual Gem & Mineral Show 2026Nov 15, 2026, 10:00 AM – 4:00 PM PSTCentre Concord, 5298 Clayton Rd, Concord, CA 94521, USA
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