Mining in the Southern California Deserts Bureau of Land .
Beneficiation Property Types . .. Ore spoon, Beveridge Mining District, Inyo County, 1991 . . Mill tailings, Valley View Mine, San Bernardino County, 1991 . .. The primary mineral commodities were gold, barium (or barite), borates, copper, .. fine crushing (usually in stamp and ball mills), followed by the addition of.Live Chat