Pyrite - Milpillas Mine, Mexico - 7.1 x 8.7 cm, xl = 1.7 cm
Mineral: Pyrite
Locality: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
Dimensions: 7.1 x 8.7 cm, xl = 1.7 cm

Description: A pyrite crystal with unusual morphology and a bluish-black coating of chalcocite. These were collected from the supergene enrichment zone in 2013.