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Bournonite Galena & Chalcopyrite

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ESM784057

Bournonite Galena & Chalcopyrite

Classic Locality

Description Tabs

Description
Locality: 
Cavnic Mine, Maramureș County, Romania
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 4 × 3 cm
Description

Sharp grey metallic cogwheel-like bournonite crystals with golden chalcopyrite crystals and minor grey metallic galena crystals on matrix

Mineral Data
What's on the rock

Bournonite

Formula: 
PbCuSbS3
Strunz: 
2.GA.50
Hardness: 
2.5 - 3.0
Type Locality: 
Wheal Boys (Trewetha Mine; Old Trewetha Mine), Port Isaac, St Endellion, Wadebridge District, Cornwall, England, UK

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0