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Bournonite Quartz & Calcite

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PFK726133

Bournonite Quartz & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Madem-Lakko Mine, Cassandra Mines, Aristotelis, Chalkidiki, Central Macedonia, Greece
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.7 × 7.5 × 3.5 cm
Description

Excellent and rare, old, classic example of bournonite from this closed, classic, northern Greek locality. The piece hosts excellent crystals of bournonite in an unusual habit, associated with contrasting quartz crystals and minor calcite. The presence of other, rare sulphides is possible but only analysis could tell us.

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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