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Bournonite With Quartz

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QRI671934

Bournonite With Quartz

Classic Locality

Description Tabs

Description
Locality: 
Herodsfoot Mine, Lanreath, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.9 × 5 × 1.7 cm
Largest Crystal: 
1.40cm
Description

One of the most classic specimens of the current auction: a British bournonite. It comes as a double face group of crystals (at least 4 can be clearly discerned). Specifically, fresh blocky crystals on a thin speck of white quartz, with one large individual proudly standing semi vertically, very photogenic. Quite lustrous and with visible growth patterns. It has a few peripheral contacts.
Very sought after. Good specimens can be found only in old collections and are typically very highly priced.

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

Seller Information

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