Mariposa Gem and Mineral Club

Our Annual Gem and Mineral Show is held each Spring at the Mariposa County Fairgrounds.  The 2024 show is April 13th and 14th, 2024, 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 available later in the year.

The club is a member of the California Federation of Mineralogical Societies. 

Yosemite Valley waterfall
Bridalveil Fall, Yosemite Valley


We normally hold meetings monthly.  We also have a few parties a year!


"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.

Local Mining History

There are 1401 mines in Mariposa County.

Join Us

Yearly Membership fees:  $20 singles,   $30 couples,   $35 families.