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Native Silver & Bornite

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CLB561005

Native Silver & Bornite

Classic Locality

Description Tabs

Description
Locality: 
San Martin Mine, Sombrerete, Zacatecas, Mexico
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 2.8 × 2.7 cm
Description

A very good specimen of what this locality is famous for: thin sheets of native silver in and - in this case - holding together pieces of massive blueish and reddish iridescent bornite. This material has become scarce over the years.

Mineral Data
What's on the rock

Silver

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

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

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