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Gustavite & Bournonite

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SCH56448

Gustavite & Bournonite

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Description
Locality: 
Herminia Mine, Julcani, Huancavelica Department, Peru
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.2 × 1.8 cm
Description

Antimony-rich gustavite has developed highly lustrous, long-prismatic, grey-metallic crystals of 3 mm, on a bournonite-barite-pyrite matrix.

Mineral Data
What's on the rock

Gustavite

Formula: 
Ag3Pb5Bi11S24
Strunz: 
2.JB.40a
Hardness: 
3.5
Type Locality: 
Ivigtut Cryolite deposit, Ivittuut (Ivigtut), Arsuk Fjord, Sermersooq, Greenland

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
schani

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