The chalcocite/ digenite
is converted to copper sulphate and the gold reports to the residue.
The powder diffraction pattern was consistent with the digenite
phase of copper sulfide that has a stoichiometry of [Cu.
Dominant sulphide minerals are chalcopyrite, pyrite and bornite with subordinate chalcocite and digenite
There is also minor galena, tennantite, and digenite
Today the Butte mines are closed and flooded, but its mineralogical legacy of fine specimens remains--most noteably the copper sulfide and sulfosalt minerals such as bornite, chalcocite, chalcopyrite, colusite, covellite, digenite
, djurleite, and enargite, and other minerals such as barite, pyrite, quartz and silver.
The predominant economic sulphide minerals are chalcocite, digenite
, bornite, carrollite and chalcopyrite.
, bornite, and chalcopyrite are the major Cu minerals.
0% Cu, comprises mainly chalcopyrite, bornite, digenite
Evidently he was satisfied with the amount I paid him, as he continued to send me more nice crystal specimens from Butte, including rhodochrosite, enargite, digenite