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Tourmaline Var Dravite

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RHT796765

Tourmaline Var Dravite

Classic Locality

Description Tabs

Description
Locality: 
Pajaru, Jajarkot District, Karnali Pradesh, Nepal
Class: 
Single Crystal
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 1.8 × 1.2 cm
Weight: 
15.00gr
Description

Maybe the world's best, gemmy dravite crystals come from this locality. The crystal is well-terminated all around with the exception of a thin sheet/layer on one end (cleavage). It is glossy and shows remarkable translucency , specially with minor backlight.

When crystals of this quality appear on the market, they are from very old finds (fifties/sixties) and quickly disappear.

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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