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Bournonite

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SUR16529

Bournonite

Description Tabs

Description
Locality: 
Machacamarca Mine, Potosi Department, Bolivia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 2 cm
Description

Excellent, sharp, lustrous "cogwheel" shaped twinned crystal of bournonite on micro quartz matrix.

There are several other coarser crystals in addition.

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
Surrey Minerals
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