Sulfides Mineral name Location Realgar, Orpiment Humbolt Co., Nevada Iron Pyrites Enargite, Pyrite, Quartz Butte, Montana Marcasite, Sphalerite Hazel Green, Wisconsin Sphalerite on Dolomite Joplin, Missouri Digenite Butte, Montana Stibnite Iyo, Japan Chalcocite Butte, Montana Pentlandite in Pyrrhotite Sudbury, Ontario Cobaltite, Cobalt Bloom with Silver Cobalt, Ontario Niccolite Cobalt, Ontario Cinnabar California Chalcopyrite on Dolomite Cardin, Oklahoma Marcasite Missouri Marcasite on Galena Baxter Springs, Kansas Oxidizing Pyrite with Deformed Quartz Butte, Montana Covellite Spectalator Mine, Butte, Montana Galena Silverton, Colorado Pyrite with Quartz Butte, Montana Breithauptite Cobalt, Ontario Chalcocite Butte, Montana Calcite, Galena, Chalocopyrite Cobalt, Ontario Iron Pyrites Ricco, Colorado
