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Hydroxylherderite With Topaz & Tourmaline

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KRM192858

Hydroxylherderite With Topaz & Tourmaline

Description Tabs

Description
Locality: 
Gilgit-Baltistan, Pakistan
Size Range: 
Cabinet (10-18 cm)
Size: 
6 × 10 × 5 cm
Description

 An interesting nice combination specimen of minor well terminated herderite, tourmaline, topaz. There are two (metallic acicular spray &  brown mineral) undefined minerals can be seen at one edge.

A really nice interesting specimen in person.

Mineral Data
What's on the rock

Hydroxylherderite

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

Topaz

Formula: 
Al2(SiO4)(F,OH)2
Strunz: 
9.AF.35
Crystal System: 
Orthorhombic - Dipyramidal
Hardness: 
8.0
Streak: 
White

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Crystal System: 
Trigonal
Hardness: 
7

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