Mariposa Gem and Mineral Club
Our Annual Gem and Mineral Show is held each Spring at the Mariposa County Fairgrounds. The 2025 show is April 12th and 13th, 2025, featuring more than 35 vendors offering gems, minerals, fossils, lapidary products, and jewelry.
Our show also features a large raffle, silent auction, geode cutting, and food.
Each Fall (normally October) we host a tailgate sale in the fairgrounds parking lot. The 2024 tailgate schedule will be Saturday, October 12.
The club is a member of the California Federation of Mineralogical Societies. 
"The Quarry" Workshop
The Quarry (for members only) is located in the basement of the Mariposa Hotel Inn at 5029 Highway 140, on Main Street in Mariposa. Access is limited to trained and certified MGMC members, who check out a key at The Mariposa Inn.
Mariposa Gem and Mineral Club Store
Our Store is located at 4994 7th Street, Mariposa. We offer items created or collected by our members.
Field Trips
Our field trips (for members only) range from Nevada to the Pacific Coast. Many members enjoy camping on extended trips.
Classes and Certifications
We offer a variety of classes on semi-precious stone and dichroic jewelry preparation. Certification for equipment use is offered when needed.
Join Us
Yearly Membership fees: $20 singles, $30 couples, $35 families.