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Topaz On Cleavelandite

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PDM754689

Topaz On Cleavelandite

Gem Crystal

Description Tabs

Description
Locality: 
Dassu, Braldu Valley, Skardu District, Gilgit-Baltistan, Pakistan
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 5.9 × 3.3 cm
Largest Crystal: 
1.60cm
Description

Lustrous topaz crystals of incredible gemmyness, on a matrix of cleavelandite and muscovite.

Acquired in 1996. Ex. Dr. Bob Janssens specimen, #949.

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

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