| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Missouri > Galena (Spinel-law twinned crystals) |
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| DESCRIPTION: | No. 40675 |
| Mineral: | Galena (Spinel-law twinned crystals) |
| Locality: | Sweetwater Mine, Viburnum Trend, Reynolds County, Missouri |
| Description: | Lustrous metallic galena crystals with unusual flattened crystal habit the result of Spinel law twinning on the {111} plane. Repeated, multiple twin planes are visible on the edges similar to macle diamonds. Ex. Steve Chamberlain collection #2981; acquired in 1981; ex. J. Velthuizen #890 |
| Overall Size: | 5x3.5x3 cm |
| Crystals: | 5-20 mm |
| Archived: | For reference only |
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