| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Colorado > Sphalerite (Spinel-law twinned crystals) |
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| DESCRIPTION: | No. 77258 |
| Mineral: | Sphalerite (Spinel-law twinned crystals) |
| Locality: | Eagle Mine, Gilman District, Eagle County, Colorado |
| Description: | Lustrous black sphalerite crystals on pyrite and sphalerite matrix. The sphalerite crystals are twinned following the Spinel Law of isometric twinning on the {111} octahedral plane, resulting in triangular appearance with beveled edges. Ex. Don Belsher collection |
| Overall Size: | 7x4x4 cm |
| Crystals: | 5-15 mm |
| Archived: | For reference only |
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