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Prehnite Quartz & Calcite

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RAF121884

Prehnite Quartz & Calcite

Gem Crystal

Description Tabs

Description
Locality: 
Goboboseb Mountains, Brandberg, Dâures, Erongo Region, Namibia
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 9 × 5 cm
Largest Crystal: 
3.00cm
Description

A unique specimen of prehnite, quartz, barite and calcite crystals. This specimen is sawn at the bottom and sits nice. A gem of a specimen. But large... The value of this specimen is $300++
Weight: 386 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

Quartz

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

Calcite

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