Sponsored by Mariposa Gem and Mineral Club April 12 and 13, 2025 10 am to 5 pm on Saturday, 10 am to 4 pm on Sunday $5 admission for adults, kids under 14 are free, parking is free The “Mountains of Minerals” show serves as a focal point to share mineral specimens from world-wide locations. Dealers from far and wide gather to share their knowledge and stock of minerals  and demonstrations of lapidary techniques are show highlights. This show is usually the only Gem Show in California at that […]