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Calcioandyrobertsite

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SKY190731

Calcioandyrobertsite

Rare Mineral-Classic locality
Type Locality

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 0.9 × 0.4 cm
Description

Sky blue gemmy crystals of the extremely rare and extremely sought after mineral calcioandyrobertsite (!), in a colorful specimen of a this rarity from Tsumeb. The electric blue color shown in the first 2 photos is completely real and characteristic of the species. Of course type locality for the species. Matrix is tennantite. Calcioandyrobertsite has been famous since a photo of the then unique outstanding type specimen was pictured in the cover of The Mineralogical Record (vol.30, nº3, 1999) jointly with the original article and was labeled as RRR! in the Gebhard book (single specimen). Don't miss the oppourtunity to get such a excepcional rarity ! The specimen has a label of Crystal Classics that will be sent to the buyer. Calcioandyrobertsite has been confirmed by EDS at the Royal Ontario Museum (ROM). Very nice under the microscope!

Mineral Data
What's on the rock

Calcioandyrobertsite

Formula: 
KCaCu5(AsO4)4(H2AsO4)·2H2O
Strunz: 
8.DH.50
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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