Mineral, Gem & Jewelry Show & SaleMineral & Gem Society of Castro Valley. Annual show & sale. Local Irvington District Fossils. Large Fluorescent Mineral display. GIA Gem Identification. No.CA Geological Society Rock ID. 40+ Dealers. 40+ Exhibits. Live Demonstrations. Geode Splitting. Kid's Spinning Wheel. Opal Pendant Raffle. Live Auction. Door Prizes. Free Parking. Fri. 10:00 am-6:00 ...
