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Topaz & Albite

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PFK622664

Topaz & Albite

Description Tabs

Description
Locality: 
Shigar District, Gilgit-Baltistan, Pakistan
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 2.7 × 1.7 cm
Description

This is a full gem topaz with some albite on the size serving as matrix. The crystal has good color despite the remarkable transparency. It has good luster with quite sharp termination. The back of the top of the crystal is contacted with some mica so this is a contact area and not man-made damage. Broken-off at the base.
 

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

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

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