| AllMinerals/JohnBetts-FineMinerals > Online Mineral Museum Photographic Archive > Minerals from Namibia > Dioptase on Calcite with Quartz |
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| DESCRIPTION: | No. 42158 |
| Mineral: | Dioptase on Calcite with Quartz |
| Locality: | Tsumeb Mine, Otavi-Bergland District, Oshikoto, Namibia |
| Description: | Superb specimen of large emerald-green dioptase crystals to 20 mm across on a rounded knob of matrix coated with transparent pale-blue quartz crystals to 2 and translucent yellow calcite crystals to 10 mm. Ex. Robert C. Lambert (1919-2008) #416; ex. William Boyce Thompson (1869-1930), founder of Newmont Mining, who donated his mineral collection in 1930 AMNH No. T-88/2 |
| Overall Size: | 6.5x5x5 cm |
| Crystals: | 1-20 mm |
| Archived: | For reference only |
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