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Marcasite & Calcite

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ESM676877

Marcasite & Calcite

Description Tabs

Description
Locality: 
Reocín Mine, Reocín, Cantabria, Spain
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
4 × 7 × 5 cm
Description

Clusters of brass coloured marcasite crystals on calcite crystals

Mineral Data
What's on the rock

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