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Prehnite On Calcite

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PJM89975

Prehnite On Calcite

Ex J & S Mommers Collection.

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.3 × 3.5 × 2.7 cm
Description

A single, translucent, apple green hemisphere of prehnite crystals on a bed of small stubby calcite crystals from the Erongo Mountains

Mineral Data
What's on the rock

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

Calcite

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

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