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Sylvanite

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UVM690926

Sylvanite

Classic Locality

Description Tabs

Description
Locality: 
Spotted Horse Mine, Fergus County, Montana, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 2.7 × 1.4 cm
Description

Sharp crystals of sylvanite in a clay layer on matrix, as well as in the hard rock layer below.    Nice crystals from a very obscure locality.

Mineral Data
What's on the rock

Sylvanite

Formula: 
(Au,Ag)2Te4
Strunz: 
2.EA.05
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.0
Type Locality: 
Baia de Arieş (Offenbánya), Alba Co., Romania

Seller Information

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