| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Michigan > Copper inclusions in Calcite |
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| DESCRIPTION: | No. 50288 |
| Mineral: | Copper inclusions in Calcite |
| Locality: | Keweenaw Peninsula Copper District, Michigan |
| Description: | Transparent scalenohedral calcite crystals to 30 mm long with metallic copper inclusions. The calcite protected the copper from tarnishing resulting in the bright metallic luster. The exposed copper crystals on the rear surface have dark patina. Ex. Peter B. Nalle (1923-2010) collection #102a |
| Overall Size: | 34x26x15 mm |
| Crystals: | 1-30 mm |
| Archived: | For reference only |
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