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Tourmaline Var Dravite

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MGR798907

Tourmaline Var Dravite

Description Tabs

Description
Locality: 
Pajaru, Jajarkot District, Karnali Pradesh, Nepal
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3 × 1.5 cm
Description

Dravite is a more uncommon variety of tourmaline and translucent, colorful crystals are not very common at all. The particular specimen features a double terminated, highly lustrous and sharp terminated crystal perched on matrix. This crystal is about 21mm across. I used minor backlight to show the intense internal color. No significant damages to report - the crystal is complete and on same high quality backside (second photo shows backside).

Mineral Data
What's on the rock

Tourmaline

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

Dravite

Formula: 
Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Strunz: 
9.CK.05
Crystal System: 
Trigonal
Hardness: 
7.0
Type Locality: 
Dobrova, Dravograd (Unterdrauburg), Slovenia
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