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Bournonite On Quartz

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SCH179753

Bournonite On Quartz

Description Tabs

Description
Locality: 
Quiruvilca Mine, Quiruvilca District, Santiago de Chuco Province, Libertad Department, Peru
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.9 × 3.6 × 2.1 cm
Description

Bright metallic crystals of bournonite up to 9 mm on plate of milky quartz crystals up to 4 mm. The bournonite crystals show complex twinning and secondary faces around the edges. Very good for the locality.

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White
schani

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