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