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Ferrilotharmeyerite & Cuprian Adamite

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PDM641295

Ferrilotharmeyerite & Cuprian Adamite

Rare Mineral

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.6 × 2 cm
Largest Crystal: 
0.20cm
Description

An uncommon specimen of microcrystalline chalcocite matrix covered by transparent, bottle-green very lustrous prismatic crystals of adamite (variety cuprian) and yellow ferrilotharmeyerite microcrystals forming a crust.

An aesthetic miniature from Willy Israel, a well-known Belgian collector of Tsumeb minerals who bought it in Tsumeb in 1978.

Mineral Data
What's on the rock

Ferrilotharmeyerite

Formula: 
Ca(Fe3+,Zn)2(AsO4)2·2(OH,H2O)
Strunz: 
8.CG.15
Crystal System: 
Monoclinic
Hardness: 
3.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

Cuprian Adamite

Variety Of: 

Adamite

Formula: 
Zn2(AsO4)(OH)
Strunz: 
8.BB.30
Hardness: 
3.5
Formula: 
(Zn,Cu)2AsO4OH
Hardness: 
0.0

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