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Krennerite & Sylvanite & Nagyágite

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GMA917195

Krennerite & Sylvanite & Nagyágite

Description Tabs

Description
Locality: 
Săcărâmb, Deva, Hunedoara County, Romania
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 2.8 × 2.3 cm
Description

Golden yellow-grey striated, well formed krennerite crystals on matrix, associated with  with sylvanite and minor black , lustrous nagyagite crystal. The small (4 mm) nagyágite leaf are covered by tiny crystals of the second generation of Nagyagite.
There are mainly krennerite crystals with grainy sylvanite crystalaggregates

A classic piece from Sacaramb (Nagyag).The type locality of the krennerite and nagyagite is Sacaramb.

Mineral Data
What's on the rock

Krennerite

Formula: 
(Au,Ag)Te2
Strunz: 
2.EA.15
Hardness: 
2.0 - 3.0
Type Locality: 
Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Deva, Hunedoara Co., Romania

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

Nagyágite

Formula: 
Pb5Au(Te,Sb)4S5-8
Strunz: 
2.HB.20a
Crystal System: 
Tetragonal
Hardness: 
1.0 - 1.5
Type Locality: 
Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Deva, Hunedoara Co., Romania

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