exclusiveminerals2:
Bornite pseudomorphs after covellite, Leonard Mine, Butte, Silver Bow County, Montana, United States; Ex Joe McCown Junior Collection; 6.5 cm across
exclusiveminerals2:
Covellite replaced by bornite with pyrite, enargite, quartz, brochantite, malachite and gypsum, East Colusa Mine, Butte, Silver Bow County, Montana, United States; Joe McCown Junior Collection; c. 6 cm across
exclusiveminerals2:
Enargite with bornite veneer with quartz, Steward Mine, Butte, Silver Bow County Montana, United States; 6.5 cm across