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Galena With Pyrite

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QRI777546

Galena With Pyrite

Former collection Kasper (CH)
Classic Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 2.4 × 2.8 cm
Largest Crystal: 
0.80cm
Weight: 
34.00gr
Description

A fissure in the white sugary marble is occupied by a sizeable cube of galena, dark and apparently altered on the outside. The crystal is broken and reveals a textbook galena cleavaged structure, with excellent metallic lustre. On its side, an undetermined metallic phase, possibly a sulphosalt. Along the specimen, half a dozen pyrite crystals with excellent brassy lustre, while on a specimen tip there is a millimetric, perfect, colorless dolomite crystal.

Galena of this size is very uncommon at the Lengenbach quarry.
From the former collection Kasper (CH), it dates back to the 60s.

Pasted Label
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

Pyrite

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

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