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Topaz Cleavelandite & Orthoclase

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ESM718788

Topaz Cleavelandite & Orthoclase

Description Tabs

Description
Locality: 
Darrah I Pech, Chapa Dara District, Kunar Province, Afghanistan
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
5 × 11 × 10 cm
Description

Sharp gemmy topaz crystals with crystalline cleavelandite on orthoclase (sawed)

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

Cleavelandite

Variety Of: 

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Hardness: 
6.0 - 6.5
Hardness: 
0.0

Orthoclase

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