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Prehnite & Quartz

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RAF110039

Prehnite & Quartz

Description Tabs

Description
Locality: 
Goboboseb Mountains, Brandberg, Dâures, Erongo Region, Namibia
Size Range: 
Cabinet (10-18 cm)
Size: 
15.5 × 11.5 × 4 cm
Largest Crystal: 
2.80cm
Description

A fine specimen of a prehnite balls and quartz crystals that came out from Goboboseb Mountain.
The prehnite balls are very fine...
Weight: 899gr.

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