| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Mexico > Chalcocite coated Pyrite |
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| 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 µm) 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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