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Ferberite On Arsenopyrite

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CR65259

Ferberite On Arsenopyrite

Description Tabs

Description
Locality: 
Panasqueira Mines, Covilhã, Castelo Branco District, Portugal
Size Range: 
Cabinet (10-18 cm)
Size: 
11.5 × 11 × 5 cm
Largest Crystal: 
4.00cm
Description

Sharp black ferberite crystals up to 4 cm on lustrous arsenopyrite crystals from an old collection.

The backside is completely covered by siderite crystals and small gemmy fluorapatite crystals.

Collected 1976.

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