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Ferberite With Arsenopyrite

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BMM633558

Ferberite With Arsenopyrite

Description Tabs

Description
Locality: 
Tazna, Cerro Tazna, Atocha-Quechisla, Nor Chichas Province, Potosi Department, Bolivia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 6.5 × 3 cm
Description

The mine at Tasna has produced some of the finest ferberite specimens in the world, easily rivaling the best pieces from the Panasqueira mine in Portugal or the Yaoganxian mine in China. This specimen features one exposed top quality, sharp, highly lustrous, jet-black, crystal of ferberite which is grown on exceptionally sharp, gun metal color and lustrous crystals of arsenopyrite. The piece came out of its pocked in perfect condition.

Mineral Data
What's on the rock

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Crystal System: 
Monoclinic
Hardness: 
4.0 - 4.5
Type Locality: 
Niña Mine, Sierra Almagrera, Cuevas del Almanzora (Cuevas de Vera), Almería, Andalusia, Spain

Arsenopyrite

Formula: 
FeAsS
Strunz: 
2.EB.20
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0