| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Michigan > Copper (crystallized) |
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| DESCRIPTION: | No. 32089 |
| Mineral: | Copper (crystallized) |
| Locality: | Houghton County, Keweenaw Peninsula Copper District, Michigan |
| Description: | Fine specimen of crystallized native copper in branching, arborescent cluster. No matrix attached. The crystals are blocky shapes with slightly rounded edges. Many crystals show Spinel-law twinning. University of Minnesota Department of Geology and Geophysics; ex. Wendell Wilson #128 (publisher and editor of Mineralogical Record); ex. W. Borden |
| Overall Size: | 4.5x3x2 cm |
| Crystals: | 1-3.5 mm |
| Archived: | For reference only |
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