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Galena With Ankerite On Calcite

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CLB148870

Galena With Ankerite On Calcite

Classic Locality

Description Tabs

Description
Locality: 
Heights Quarry, Westgate, Weardale, County Durham, United Kingdom
Size Range: 
Cabinet (10-18 cm)
Size: 
12.5 × 5.3 × 4.2 cm
Description

Attractive specimen with ery good galena crystals on matrix with beige ankerite crystals on calcite.
Original label says 'calcite & thomsonite' but I doubt this.
There is a crack in the left galena crystal which might be repaired and the base is sawn. The rest is fine.

Mineral Data
What's on the rock

Galena

Formula: 
PbS
Strunz: 
2.CD.10
Crystal System: 
Isometric
Hardness: 
2.5
Colour: 
Lead-grey
Streak: 
Lead-grey

Ankerite

Formula: 
Ca(Fe2+,Mg)(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Styrian Erzberg, Eisenerz, Styria, Austria

Calcite

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

Seller Information

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