20hhgd.is ((CHALCOCITE, BORNITE pseudomorp after COVELLITE, PYRITE)), $100 MINIMUM BID, Leonard Mine, Butte Mining District, Silver Bow County, Montana, 8 x 7.5 x 8.5 cm , Cabinet | |
Hexagonal plates of Covellite replaced by Chalcocite coated with iridescent Bornite. Combination with Pryrite and matrix of Quartz with very small Pyrite crystals. ex Glenn Davidson collection. |