| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Arizona > Copper (Spinel Law twinned crystals) |
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| DESCRIPTION: | No. 61189 |
| Mineral: | Copper (Spinel Law twinned crystals) |
| Locality: | Ray Mine, Mineral Creek District, Pinal County, Arizona |
| Description: | Diamond-shaped formation of thin native copper crystals with no matrix attached. The copper crystals unique shape is due to twinning on the {111} plane following the Spinel Law of isometric twinning. |
| Overall Size: | 25x9x6 mm |
| Crystals: | 0.2-15.0 mm |
| Archived: | For reference only |
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