Plancheite with Dioptase Duftite on Calcite - image 1
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Plancheite with Dioptase Duftite on Calcite

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Plancheite, a copper silicate hydroxide hydrate, is actually quite rare at Tsumeb mine. This thumbnail specimen is quite delightful. It's upper surface, measuring 1.5 x 1.2 cm, is coated in tiny rhombic Calcite crystals upon which are richly scattered the most vivid and gemmy euhedral Dioptase crystals up to about 1 mm in length. Their colour is more of a bluish green as opposed to the more usually deep emerald green. The Dioptase crystals are more concentrated in one corner and become sparser towards the other end of the specimen where sub-0.5 mm diameter radiating sprays of velvety, to silky, pale turquoise blue Plancheite coats the Calcite crystals. Yellowish green Duftite is present in minor amounts. A really lovely display under the microscope.

Product details

SizeThumbnail
Dimensions1.8 x 1.8 x 1.4 cm
Added on12/02/2024
Current owner
Unknown Owner
Previous owners
DateCollectorAcquisition price
—Crystal ClassicsNot disclosed

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Plancheite
Mineral guide
Learn about Plancheite
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Plancheite
Regional guide
Plancheite from Tsumeb
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Locality guide
Tsumeb
Tsumeb, Namibia — world-renowned locality famed for a rich copper–lead–zinc ore pipe, with dioptase on calcite, azurite blades, and smithsonite prized by colle…