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Topaz With Hydroxylherderite

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KRM116609

Topaz With Hydroxylherderite

Description Tabs

Description
Locality: 
Doko, Basha Valley, Skardu, Gilgit-Baltistan, Pakistan
Size Range: 
Cabinet (10-18 cm)
Size: 
4.5 × 11 × 7.8 cm
Description

A superb platy specimen rich of large well terminated gemmy light aqua color topaz crystal incombination with herderite & muscovite.

No damage to topaz crystals.

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

Hydroxylherderite

Formula: 
CaBe(PO4)(OH,F)
Strunz: 
8.BA.10
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Streak: 
white

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