Retail show; Four Corners Gem and Mineral Club; Four Corners Gem and Mineral Club, La Plata County Fairgrounds, 431 Birket Drive; Fri. 10-6, Sat. 10-6, Sun. 10-4; $5; 70th annual show; This indoor and outdoor event hosts over 60 vendors with mineral and gem specimens, rocks and fossils, jewelry, rough material and slabs, cabochons and more. There are activities for kids, a silent auction, classes, and food trucks.