For Sale – Patented Gold and Silver Mine Located in Kern County California NI-43-101 completed February 6, 2014. This Gold and Silver Mine is a group of 5 patented and 15 unpatented mining claims.This mine is just under 300 acres total. Most of the mining claims were filed in 1902. Gold mines in Kern County, California. Kern County was the largest producer of minerals in the state in 1933. Gold-silver ores are mainly found in the eastern part of the county. Best producing regions are near Mojave, Randsburg, Caliente Canyon, Piute Mountains and Kernville.