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)
CCMGS Annual Gem & Mineral Show 2025
Sun, Nov 09
|Centre Concord
Featuring dozens of vendors, demonstrations, displays, children and family activities, raffles, auctions, door prizes and more! Come celebrate our 75th Anniversary and see what's NEW this year!
Time & Location
Nov 09, 2025, 10:00 AM – 4:00 PM PST
Centre Concord, 5298 Clayton Rd, Concord, CA 94521, USA
About the event
Get ready for a rockin’ weekend packed with affordable family fun, hands-on learning, and dazzling discoveries! Bring your friends and family to explore an incredible selection of minerals, gems, fossils, meteorites, crystals, beads, slabs, and jewelry from expert vendors and collectors.
Enjoy live demonstrations, educational displays, and our fan-favorite Fluorescent Rock Tent! Kids can dive into rock painting, games, and family activities, while adults can shop for unique gifts and holiday treasures. Don’t miss door prizes, raffles, and silent auctions happening all weekend long!
This year’s show also features special 75th anniversary highlights — including a new photo booth with our mascot, Diablo Dan!