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Dravite

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KRM691396

Dravite

Description Tabs

Description
Locality: 
Koksha Valley, Badakhshan Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
3.5 × 4.6 × 2.8 cm
Description

A large well doubly perfectly  terminated dravite-uvite tourmaline hosts to greenish micaceous matrix   , These materials were formerly known as indicolite , new reaserch (by Ian Nicastro)  shows  are actiually  dravite-uite tourmaline  , Nice perfect dravite-uvite tourmaline  specimen from seller's personal collection .

Gems & Gemmology , issue Winter 2016

 

Mineral Data
What's on the rock

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

Seller Information

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