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Jamesite & Tsumcorite

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CR41938

Jamesite & Tsumcorite

Type locality
Rare Mineral

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.3 × 2 cm
Description

Jamesite is an exceedingly rare lead zinc iron arsenate.

A few crystal groups, roughly ball-like in shape, of lustrous red-brown crystals with green-black Duftite on orange tsumcorite.

Very rare mineral from the type locality !

Mineral Data
What's on the rock

Jamesite

Formula: 
Pb2Zn(Fe2+,Zn)2Fe3+4(AsO4)4(OH)10
Strunz: 
8.BK.25
Crystal System: 
Triclinic
Hardness: 
3.0
Type Locality: 
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto Region (Oshikoto), Namibia

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