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Baumhauerite With Realgar & Pyrite

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QRI634413

Baumhauerite With Realgar & Pyrite

Former collection Burger
Classic Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 4.1 × 4.4 cm
Weight: 
113.00gr
Description

Very large mass of silvery baumhauerite covering a significant side of the marble matrix of the specimen. No individual crystals can be spotted, perhaps a few faces where opening would allow a minimal growth.
Associated, a few euhedral brassy pyrite crystals. In one fissure, a bright red, very fresh realgar crystal elegantly crops out of the sugary marble. Unfortunately, the realgar is not complete.
 

Former collection Burger (Switzerland). Pre-1950s specimen, labeled in modern times.

Mineral Data
What's on the rock

Baumhauerite

Formula: 
Pb12As16S36
Strunz: 
2.HC.05b
Crystal System: 
Triclinic
Hardness: 
3.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Realgar

Formula: 
As4S4
Strunz: 
2.FA.15a
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.0

Pyrite

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

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