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Tourmaline Var Indicolite

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MGR780836

Tourmaline Var Indicolite

Description Tabs

Description
Locality: 
Darrah I Pech, Chapa Dara District, Kunar Province, Afghanistan
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 1.2 × 0.8 cm
Description

Intense dark blue color, fine luster and end-pointed. A really fine sample from the locality. Usually indicolite needs strong backlight - not so here, daylight is enough to expose this wonderful color. Hard to photograph - all indicators (saturation, luster and clarity) are much better in person. No significant damages to report, bottom was on the rock.

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