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Dolomite Psm Calcite

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PDM785277

Dolomite Psm Calcite

Pseudomorph

Description Tabs

Description
Locality: 
Beez Quarry, Namur, Namur District, Belgium
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 3.9 × 3.8 cm
Description

Fine pseudomorph from the Beez quarry where the original scalenohedral crystal of calcite has been replaced by a polycrystalline aggregate of lustrous, ivory coloured dolomite crystals. Aesthetically the core of the initial crystal was not completely filled and originates an elongated vug richly lined by crystals. Some cubic crystals of pyrite are spotted on the surface and have a brown colour doe to alteration to iron hydr(oxides).

Collected in 2005 by F. Van Troyen.

Mineral Data
What's on the rock

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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