Native elements Mineral name Location Wire Gold Printe Boy Mine, CO Wire Silver Silver Islet, Lake Superior Antimony Kern Co., CA Copper and Silver Nuggets Houghton, MI Gold Idaho Springs,CO Float Copper Washington Co., WI Copper Houghton, MI Leaf Copper Copper Platinum & Palladium Bearing Pyroxenite Zwartsfontein, Transvaal Silver Colorado Copper Houghton, Michigan Graphite Montana Mercury San Mateo Co., California Bismuth Cobalt, Ontario Silver Nugget Mexico Sulfer Texas Chalcanthite 'Blue Vitriol' Removed Chalcopyrite Copper Altering into Bornite Copper Butte, Montana
