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Native Silver Ferrilotharmeyerite & Cuprian Adamite

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CR62743

Native Silver Ferrilotharmeyerite & Cuprian Adamite

Rare Mineral

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.5 × 1 cm
Description

A superb, rare and very showy combination specimen from the famous and now-closed Tsumeb Mine.

Lustrous, nicely burnished silver crystals and gemmy, emerald-green cuprian adamite microcrystals and olivegreen olivenite sprays are richly scattered on massive sulfide matrix coated with yellow-green ferrilotharmeyerite, hydrated arsenate, with Tsumeb being the Type Locality.

This combination is rarely seen from Tsumeb. From the upper oxidized zone of this famous locality.

Mineral Data
What's on the rock

Silver

Formula: 
Ag
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

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