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Calcite On Quartz

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BSM09240

Calcite On Quartz

Ex George Walker Collection (UK)

Description Tabs

Description
Locality: 
Helgustadir Mine, Reydarfjörđur, Fjarðabyggð, Reydarfjördur, Eastern Region, Iceland
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.5 × 7.5 × 6 cm
Largest Crystal: 
2.40cm
Description

This is an extremely interesting specimen collected in the late 1950's by George Walker himself.

It consists of two generations of calcite crystals growing over well formed prismatic crystals of quartz.

The first generation calcite is creamish colour and opaque whilst the second generation is white to colourless and tends towards transparent. Crystal form differs also.

Mineral Data
What's on the rock

Calcite

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Seller Information

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