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Dolomite & Marcasite Psm Calcite

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PDM832266

Dolomite & Marcasite Psm Calcite

Pseudomorph

Description Tabs

Description
Locality: 
Beez Quarry, Namur, Namur District, Belgium
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 5 × 4.6 cm
Description

Rarely seen are these groups of ivory coloured dolomite crystals replacing scalenohedral crystals of calcite. They are clearly hollow, polycrystalline, and the surface is richly coated by greenish twinned marcasite crystals that add an attractive touch to this pseudomorph. No damages.

Found in 2006.

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

Marcasite

Formula: 
FeS2
Strunz: 
2.EB.10a
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 6.5

Calcite

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

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