AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Mexico > Chalcocite over Pyrite |
DESCRIPTION: | No. 75757 |
Mineral: | Chalcocite over Pyrite |
Locality: | Milpillas Mine, Cuitaca, Sonora, Mexico |
Description: | Lustrous gray-metallic pyrite crystal in white dickite-rich matrix. The unusual gray color is caused by a thin (5-10 µm) layer of chalcocite on the surfaces of the pyrite crystal. One crystal face is not fully coated and exhibits yellow-metallic color. Collected in 2015. Analysis of coating performed from Ben Grguric at South Australian Museum. |
Overall Size: | 4.5x4x3.5 cm |
Crystals: | 20 mm |
Archived: | For reference only |
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