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Corundum Var Ruby & Pyrite On Graphite

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ATH938340

Corundum Var Ruby & Pyrite On Graphite

Description Tabs

Description
Locality: 
Graphite Quarry, Amstall, Krems-Land District, Lower Austria, Austria
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 4.4 × 2.5 cm
Description

Corundum var ruby combined with golden pyrite in black graphite-matrix from findings of 2021 in Amstall.

The main crystal in the center has a lenght of 3,2 cm and is well extracted from the matrix. Crystals with this size and quality are pretty rare so this is definetely a piece above average!

Around there are five more Crystals.

Ligtened with an UV-source the Corundum shows an intense red colour.

Mineral Data
What's on the rock

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
9.0
Streak: 
White

Ruby

Variety Of: 

Corundum

Formula: 
Al2O3
Strunz: 
4.CB.05
Hardness: 
9.0
Formula: 
Al2O3
Crystal System: 
Hexagonal
Hardness: 
9.0
Colour: 
Red

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Graphite

Formula: 
C
Strunz: 
1.CB.05a
Crystal System: 
Hexagonal
Hardness: 
1.0 - 2.0

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