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Prehnite Calcite & Quartz

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RAF49211

Prehnite Calcite & Quartz

Description Tabs

Description
Locality: 
Brandberg, Dâures, Erongo Region, Namibia
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 9 × 6.5 cm
Largest Crystal: 
5.00cm
Description

Prehnite, calcite and quartz with red and black inclusions. Has very strange formations of prehnite crystals on the quartz, almost like a cactus! A gem of a specimen.Has been sawn underneath so that it sits nicely. #A1292

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

Quartz

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