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Fettelite & Proustite

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SMM703250

Fettelite & Proustite

Classic Locality
Analysed

Description Tabs

Description
Locality: 
Chañarcillo, Copiapó Province, Atacama Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 1.5 × 1 cm
Description

Red blades and sheets of fettelite crystals. They are from the same specimen that was used to determine the structure. A quite rich specimen for the species! I received it from a well-known scientist who is very expert in sulfides and sulfosalts and more.

Boxed with Label
Mineral Data
What's on the rock

Fettelite

Formula: 
[Ag6As2S7][Ag10HgAs2S8]
Strunz: 
2.LA.30
Crystal System: 
Trigonal
Hardness: 
4.0
Type Locality: 
Glasberg quarry, Nieder-Beerbach, Mühltal, Odenwald, Hesse, Germany

Proustite

Formula: 
Ag3AsS3
Strunz: 
2.GA.05
Crystal System: 
Trigonal
Hardness: 
2.0 - 2.5

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