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Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

 
Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

Chalcocite coated Pyrite from Milpillas Mine, Cuitaca, Sonora, Mexico

DESCRIPTION:No. 75756
Mineral:Chalcocite coated Pyrite
Locality:Milpillas Mine, Cuitaca, Sonora, Mexico
Description:Lustrous gray-metallic pyrite crystals in white dickite-rich matrix. The unusual gray color is caused by a thin (5-10 Ám) layer of chalcocite on the surfaces of the pyrite crystals. A few incomplete pyrite crystals exhibit typical yellow-metallic color. Collected in 2015. This mine is now closed. Analysis of coating performed from Ben Grguric at South Australian Museum.
Overall Size:7x5.5x5 cm
Crystals:2-16 mm
Archived: For reference only
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