- Enargite, Pyrite
- Toenail, 3.0 x 3.3 x 2.1 cm
- Kelley Mine, Butte, Butte District, Silver Bow Co., Montana, USA
Butte is famous for producing some of the finest Enargite crystals on the planet. This piece features several highly lustrous, very sharp silvery-grey colored Enargite crystals associated with golden pyritohedra of Pyrite. The Enargite crystals measure up to 1.2 cm. Ex. Kosnar Collection.