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Chrysocolla & Calcite

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ESM850660

Chrysocolla & Calcite

Description Tabs

Description
Locality: 
Düne Island, Helgoland, Schleswig-Holstein, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 2 × 4 cm
Description

Lustrous colorless calcite crystals on blue-green chryscolla

Mineral Data
What's on the rock

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5

Calcite

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