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Gold Var Electrum With Bornite

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LGM611707

Gold Var Electrum With Bornite

Ex Lehnen collection, Möchgengladbach, Germany
With Antique Label

Description Tabs

Description
Locality: 
Zmeinogorsk Mine, Zmeevka Stream, Korbalikha River, Alei River, Rudnyi Altai, Altai Krai, Russian Federation
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.5 × 2.5 × 1.8 cm
Weight: 
13.00gr
Description

This specimen is featuring a lustrous gold var electrum leaf of 2 x 1.5 mm size on matrix, accompanied by some grains of tarnished bornite. The color of the leaf is typical - more silvery than golden. Somehow difficult to photograph - it is best visible on pic 1, just above the dark/golden bornite grain.

Although no exact locality is given on the antique label, this is a very typical specimen from Zmeinogorsk Mine (Snake Mountain Mine; Schlangenberg Mine), Altai Mountains, Western-Siberian Region, Russia, dated 19th century.

"Güldisches Silber" is an old german denotation for electrum, a gold which usually contains more than 20% silver.

Mineral Data
What's on the rock

Gold

Formula: 
Au
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Electrum

Variety Of: 

Gold

Formula: 
Au
Strunz: 
1.AA.05
Hardness: 
2.5 - 3.0
Formula: 
(Au, Ag)
Strunz: 
1.AA.05
Hardness: 
0.0

Bornite

Formula: 
Cu5FeS4
Strunz: 
2.BA.15
Crystal System: 
Tetragonal
Hardness: 
3.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Seller Information

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