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Topaz With Tourmaline

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KRM222122

Topaz With Tourmaline

Description Tabs

Description
Locality: 
Rangkul Pegmatite, Rangkul Highlands, Pamir Mountains, Gorno Badakhshan, Tajikistan
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2 × 3.6 × 3.1 cm
Description

 A superb and very rare from the locality  , a large well terminated gemmy loustrous topaz crystals in combination with gemmy tourmaline , tourmaline crystals crossing topaz crystal , basel cleavage can be seen at base topaz crystal. 

Undamaged , minor etching at base.

A very good high quality specimen from the locality , very very hard to find from the keep locality.

 

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

Tourmaline

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

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