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Sylvanite

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CR144556

Sylvanite

Rare Mineral from Type Locality
Classic Locality

Description Tabs

Description
Locality: 
Baia de Arieş, Alba County, Romania
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 4.5 × 2 cm
Description

Sylvanite, the rare silver and gold telluride, was discovered here at the type locality in 1835. It is known at its best for this surreal, metallic-organic growth that seems to have pattern, when crystallized at we see here. More technically speaking, these are flat-lying crystals in the form of typical graphic intergrowths ("Schrifterz"). The effect is bizarre, and beautiful. Good hand-sized specimens from this type 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