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Calcite & Dolomite

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PAV921352

Calcite & Dolomite

Classic Locality

Description Tabs

Description
Locality: 
Cruz dos Meninos Quarry, Santa Maria, Estremoz, Évora District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 5 × 2 cm
Description

Several undamaged calcite crystals on a dolomite plate.

Collected: 
2015
Boxed with Label
Mineral Data
What's on the rock

Calcite

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

Dolomite

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