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Ankerite & Calcite

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ESM956920

Ankerite & Calcite

Description Tabs

Description
Locality: 
Freiberg, Mittelsachsen, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 3 cm
Description

Pale brown ankerite crystals on calcite crystals (comes with a label Krantz & Comp. in Berlin, 1837-1850)

Mineral Data
What's on the rock

Ankerite

Formula: 
Ca(Fe2+,Mg)(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Styrian Erzberg, Eisenerz, Styria, Austria

Calcite

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