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Topaz & Orthoclase

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ESM888698

Topaz & Orthoclase

Description Tabs

Description
Locality: 
Erongo Mountains, Karibib, Erongo Region, Namibia
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
12 × 9 × 7 cm
Description

Clear topaz cystals attached to a large brown orthoclase crystal with small black schorl needles

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

Orthoclase

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