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Feldspar Tourmaline & Topaz

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ESM698795

Feldspar Tourmaline & Topaz

Description Tabs

Description
Locality: 
Klein Spitzkopje, Karibib, Erongo Region, Namibia
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
15 × 9.5 × 4.5 cm
Description

Creme-coloured blocky feldpar covered by hundreds of dark green tourmaline needles with clear topaz crystals, feldspar partially shows green amazonite

Mineral Data
What's on the rock

Feldspar

Group Parent: 
Feldspar Group

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White
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