The Western Dakota Gem & Mineral Society is gearing up for their 38th Annual Gem & Mineral show. July 20th-22nd. Details can be found here: http://www.wdgms.org/2011Show.html
Field trips are being planned, and can be read about here: Rapid City Field Trips
Trips include the Antelope Ridge, Black Hills National Forest & Hill City area, Railroad Butte / Farmingdale, and Conata.