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Bornite With Quartz

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LGM521550

Bornite With Quartz

Ex Ring collection, Munich, Germany
Classic Locality

Description Tabs

Description
Locality: 
Dzhezkazgan, Karaganda Oblast, Kazakhstan
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.8 × 4.3 × 1.7 cm
Largest Crystal: 
0.60cm
Weight: 
14.00gr
Description

Sharp bornite crystals on a lawn of quartz crystals, with mostly dull luster and partly coated by a patina.
The bornites show an unusual tabular, pseudo-hexagonal habit, most likely a pseudomorph after chalcocite (which is described for that locality).

Meanwhile a highly sought-after classic from the early 1990s.

Mineral Data
What's on the rock

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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