Bornite over Pyrite
Milpillas Mine, Mexico
Milpillas Mine, Cuitaca, Mun. de Santa Cruz, Sonora, Mexico
An outstanding bornite coating pyrite on matrix from the famous Milpillas Mine in Sonora, Mexico! This specimen features a bit of matrix that hosts several highly modified pyrite crystals that have been coated with a thin layer or bornite. Bornite has been confirmed by the University of Arizona. These starting coming out about 2 years ago when the mining company began operations in the sulfide zone.