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Bournonite & Sphalerite

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Watches:
SCH108189

Bournonite & Sphalerite

Ex. Ed. David Collection

Description Tabs

Description
Locality: 
Cerro de Potosí, Potosí City, Potosi Department, Bolivia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.1 × 3 cm
Description

Several metallic bournonite crystals on white quartz-coated matrix. The bournonite crystals are twinned resulting in classic cogwheel crystal form. Two crystals show damage when viewed under magnification. Very good for the locality. Ex. Ed. David collection.

 

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

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0
schani

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