California Bureau of Mines

San Diego County, California Mines and Minerals

Kern County, California Mines and Minerals

Placer County, California Mines and Minerals

Santa Barbara County, California Mines and Minerals

Mariposa County, California Mines and Minerals

Yuba County, California Mines and Minerals

Trinity County, California Mines and Minerals

Calaveras County, California Mines and Minerals

Nevada County, California Mines and Minerals

San Bernadino County, California Mines and Minerals

Tolumne County, California Mines and Minerals

Sierra County, California Mines and Minerals

Shasta County, California Mines and Minerals

Plumas County, California Mines and Minerals