Since 1993

Our annual gem and mineral show is held each Spring at the Mariposa Fairgrounds.  We have just learned that our 2020 event is canceled in compliance with government health requirements.  The show was planned to be on April 11th and 12th. The show hosts more than 36 vendors offering gems, minerals, fossils,  lapidary products, jewelry, and food.

Each Fall, we host a tailgate sale in the fairgrounds parking lot.  For 2019, our event planned for October 19th is cancelled due to wildfire in the area.

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

Yosemite Valley waterfall
Bridalveil Fall, Yosemite Valley


We hold meetings monthly at the California State Mining and Mineral Museum located at the Mariposa Fairgrounds.  In June and December, we hold potluck dinners at designated locations.


"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 Store.

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 the 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.