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Trechmannite Smithite & Hutchinsonite

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SKY192655

Trechmannite Smithite & Hutchinsonite

Rare Mineral-Classic locality
Type Locality

Description Tabs

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

Outstanding combination of 3 very rare minerals from Lengenbach, all of them with its type locality in the quarry, so you will have 3 type localities in a single specimen ! Trechmannite is the rarest and nicest, as deep red gemmy well formed single crystals (photos 1, 2 and 5, two crystals in total), hutchinsonite occurs as well formed deep blocky red crystals (photo 3) and smithite as acicular orange red crystals (photo 4). The total number of catalogued trechmannite and smithite specimens up to 2008 was only 261 and 121 respectively ! (Faszination Lengenbach book).

Mineral Data
What's on the rock

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

Smithite

Formula: 
AgAsS2
Strunz: 
2.GC.30
Crystal System: 
Monoclinic Tabular crystals.
Hardness: 
1.5 - 2.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

Hutchinsonite

Formula: 
TlPbAs5S9
Strunz: 
2.HD.45
Hardness: 
1.5 - 2.0
Type Locality: 
Lengenbach Quarry, Fäld (Imfeld; Im Feld; Feld), Binn Valley, Wallis (Valais), Switzerland

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