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Sylvanite & Coloradoite

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SER1008162

Sylvanite & Coloradoite

Description Tabs

Description
Locality: 
Jefferson County, Montana, United States of America
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3.5 × 2.1 cm
Description

grey metallic sylvanite and black coloradoite on matrix

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

Coloradoite

Formula: 
HgTe
Strunz: 
2.CB.05a
Hardness: 
2.5 - 0.0
Type Locality: 
Keystone Mine, Magnolia District, Boulder Co., Colorado, USA