Bornite over Pyrite
Milpillas Mine, Mexico
Milpillas Mine, Cuitaca, Mun. de Santa Cruz, Sonora, Mexico
An absolutely stunning single crystal of pyrite coated with a steel-blue layer of bornite from the Milpillas Mine in Sonora, Mexico! The pyrite is incredible, exhibiting many modified faces. The crystal sits perched upon a small bit of white matrix. The bornite coating has been confirmed by analysis done at the University of Arizona. A fantastic thumbnail pyrite from this now famous locality!