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Bournonite On Pyrite

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PJM93096

Bournonite On Pyrite

Ex J & S Mommers Collection
Type Locality

Description Tabs

Description
Locality: 
Wheal Boys, Port Isaac, St Endellion, Cornwall, United Kingdom
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.4 × 1.6 cm
Largest Crystal: 
0.90cm
Description

A classic Cornish bournnite from the type locality which was collected over a hundred years ago. The bournonite cogwheels to 0.9cm are scattered across a field of small pyrite crystals with some black sphalerite crystals.

Acquired from Meso Minerals in 1992 at the Tucson Show

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

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5
Earthstones Australia

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