Exsolution of blebs and lamellae of chalcopyrite, digenite, and chalcocite is common. It is found in nature as the mineral chalcocite. Intergrowths and transformations between djurleite, digenite and chalcocite are common. Other minerals mined are bornite, pyrite, chalcocite. Associated minerals include arsenopyrite, stannoidite, chalcopyrite, chalcocite, sphalerite and tennantite. In this locality digenite is found with covellite, chalcocite and bornite. The main copper mineral found is chalcopyrite, locally accompanied by bornite, chalcocite and tennantite. Major sulfide minerals are pyrite, chalcopyrite, bornite and chalcocite. The most efficient minerals are supergene minerals such as chalcocite, CuS and covellite, CuS. The main copper ore minerals are chalcocite and covellite. Chalcopyrite, covellite, chalcocite, and galena are commonly observed in the mineral assemblage. Prominent copper sulfide minerals include CuS (chalcocite) and CuS (covellite). Chalcopyrite is the primary ore mineral, which may be altered to chalcocite. Where unoxidized the rhyolite contains abundant pyrite, chalcopyrite and chalcocite. Chalcocite and covellite were sent directly to the smelting plant in Tacoma.