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Tourmaline Var Indicolite & Quartz

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MGR742329

Tourmaline Var Indicolite & Quartz

Description Tabs

Description
Locality: 
Kana Kana, Achin District, Nangarhar Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 5.3 × 3.5 cm
Description

The main crystal is 56mm tall and16 in diameter. The color is simply superb - a very dark, incredible strong blue, which nearly tends to violet (even much better in person) with minor green zoning below the end-point. The crystal is sharp terminated and highgly lustrous. It is set on well shaped glossy Rock Crystals. Should be very high valued for this more uncommon locality and the fantastic color. Photo was done with moderately backlight, no significant damages to report.

Mineral Data
What's on the rock

Tourmaline

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

Indicolite

Variety Of: 

Tourmaline

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

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White