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Topaz On K Feldspar

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RAF634137

Topaz On K Feldspar

Gem Crystal

Description Tabs

Description
Locality: 
Klein Spitzkopje, Karibib, Erongo Region, Namibia
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 8.3 × 6.5 cm
Largest Crystal: 
5.00cm
Weight: 
360.00gr
Description

Topaz on K-feldspar matrix. It is very rare to find a gem of a crystals like these on K-feldspar. A Fabulous specimen.  Has been trimed at the bottom...  Very hard ti find large topaz like this on matrix...

Mineral Data
What's on the rock

Topaz

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

K Feldspar

Synonym Of: 

Microcline

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0 - 6.5

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0

Sanidine

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
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