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Prehnite & Calcite

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RAF146650

Prehnite & Calcite

Classic Locality

Description Tabs

Description
Locality: 
Brandberg, Dâures, Erongo Region, Namibia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 5 × 2.3 cm
Largest Crystal: 
1.90cm
Description

A very fine specimen of a green prehnite crystal on calcite, that came out from Brandberg. contact mark on one side of the ball. Still nice.

Weight: 55 gr.

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