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Quartz & Prehnite

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RAF207829

Quartz & Prehnite

Classic Locality

Description Tabs

Description
Locality: 
Brandberg, Dâures, Erongo Region, Namibia
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 4 × 2.5 cm
Largest Crystal: 
2.50cm
Weight: 
23.00gr
Description

Loveley contrast between the Quartz & Prehnite in this specimen from Brandberg in the Erongo Region of Namibia.. Largest crystal is 2.5 cm..  

Mineral Data
What's on the rock

Quartz

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

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