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Binnite & Trechmannite

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SKY198782

Binnite & Trechmannite

Rare Mineral-Classic locality
Type Locality

Description Tabs

Description
Locality: 
Lengenbach Quarry, Binntal, Valais, Switzerland
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2 × 1.5 cm
Description

Two well formed typical binnite crystals (photos 1 and 5) associated to an small grouping of trechmannite deep red crystals (photos 3 and 4) and orange realgar (photo 2). Trechmannite is one of the most interesting Lengenbach minerals, known for its nice red wine colour. A four locality mineral worldwide. The total number of catalogued trechmannite specimens up to 2008 was only 261 !(Faszination Lengenbach book).

Mineral Data
What's on the rock

Binnite

Variety Of: 

Tennantite

Formula: 
Cu6[Cu4(Fe,Zn)2]As4S13
Strunz: 
2.GB.05
Hardness: 
3.0 - 4.5

Trechmannite

Formula: 
AgAsS2
Strunz: 
2.GC.35
Hardness: 
1.5 - 2.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

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