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Tourmaline Var Achroite

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PDM822273

Tourmaline Var Achroite

Gem Crystal

Description Tabs

Description
Locality: 
Darrah I Pech, Chapa Dara District, Kunar Province, Afghanistan
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 0.8 × 0.7 cm
Description

Gemmy colourless crystal of tourmaline achroite that is perfectly terminated.

Acquired 2010. Ex Jan Sibtsen #1003.

Mineral Data
What's on the rock

Achroite

Variety Of: 

Tourmaline

Formula: 
A(D3)G6(T6O18)(BO3)3X3Z
Hardness: 
7
Hardness: 
0.0
Colour: 
Clear

Tourmaline

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

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