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Tsumcorite Willemite & Calcite

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MEX142583

Tsumcorite Willemite & Calcite

Rare Mineral

Description Tabs

Description
Locality: 
Berg Aukas, Grootfontein, Otjozondjupa Region, Namibia
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 2.4 × 1.7 cm
Description

Orange, monoclinic crystals on willemite crystals with calcite crystals.

Mineral Data
What's on the rock

Tsumcorite

Formula: 
Pb(Zn,Fe3+)2(AsO4)2·2(H2O,OH)
Strunz: 
8.CG.15
Crystal System: 
Monoclinic
Hardness: 
4.5
Streak: 
Yellow
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

Willemite

Formula: 
Zn2SiO4
Strunz: 
9.AA.05
Hardness: 
5.5
Streak: 
White
Type Locality: 
Vieille Montagne (Altenberg; Kelmisberg), Moresnet, Kelmis, Plombières-Vieille Montagne District (Plombières-Altenberg), Verviers, Liège Province, Belgium

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White