| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Missouri > Sphalerite (lamellar Spinel Law-twinned) |
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| DESCRIPTION: | No. 74690 |
| Mineral: | Sphalerite (lamellar Spinel Law-twinned) |
| Locality: | Tri-State Lead-Zinc Mining District, near Joplin, Jasper County, Missouri |
| Description: | Lustrous black sphalerite crystals twinned following the Spinel Law of isometric twinning. Several surfaces of the sphalerite crystals exhibit lamellar twinning, resulting in parallel bands of alternating left-right crystal structure. Ex. Julius Weber (1914-2003) collection, principle photographer of the Encyclopedia of Minerals (1974) |
| Overall Size: | 5x4x2.5 cm |
| Crystals: | 8-30 mm |
| Archived: | For reference only |
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