Description
CHALCOCITE AND CHALCOPYRITE, COVELLITE AND CHALCOPYRITE, AND ERUBESCITE Butte Mining District, Montana, USA Chalcocite and Chalcopyrite: sharp, charcoal-grey to bronzy-brown chalcocite crystals, to 15mm, are festooned atop the sculptural matrix of solid granular chalcocite ore matrix. Chalcopyrite crystals embedded in chalcocite, measuring 10 x 8 x 5 cm ; Covellite...