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Ferberite & Arsenopyrite

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RBM761637

Ferberite & Arsenopyrite

Description Tabs

Description
Locality: 
Tazna, Cerro Tazna, Atocha-Quechisla, Nor Chichas Province, Potosi Department, Bolivia
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5.8 × 3 cm
Largest Crystal: 
2.00cm
Description

This piece is from the impressive ferberite discovery in 2008 at the Tazna mine. It is a good sized, uncommon matrix specimen. The piece features several large, sharp, lustrous, aesthetic, jet-black, tabular Ferberite crystals measuring up to 2.7 cm on beautifully crystallized arsenopyrite and marcasite on matrix

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

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