- Chalcocite, Covellite, Quartz
- Cabinet, 11.5 x 6.0 x 3.1 cm
- Butte, Butte District, Silver Bow Co., Montana, USA
A fine and important cabinet combination pseudomorph specimen from the Butte District of Montana. Matte-black chalcocite pseudomorphs after covellite plates blanket the contrasting matrix of mirror-bright, brass-yellow pyrite. A scattering of well-placed, lustrous quartz crystals is a beautiful accent.