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Lazurite Psm Plagioclase

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MGR738302

Lazurite Psm Plagioclase

Rare Mineral

Description Tabs

Description
Locality: 
Ladjuar Madan, Kokcha Valley, Badakhshan Province, Afghanistan
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.4 × 6 × 4 cm
Description

Lazurite is well known for this locality - but not as pseudomorph result after plagioklase. This material was found at least 10 years ago, only a fist full of well shaped specimen ever reached the market and it was valued extremly high at the Tucson show in 2008. Since that time no new or compare-able specimen were found. The crystal shows a remarkable dimension, it is sharp terimnated and glossy. The contrast to snowy white areas to dark blue veins is very eye-catching. Should be high ranked for the out-standing rarity.

Mineral Data
What's on the rock

Lazurite

Variety Of: 

Haüyne

Formula: 
(Na,Ca)4-8(Al6Si6O24)(SO4,S,Cl)1-2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Formula: 
Na6 Ca2(Al6Si6O24)(SO4,S,S2, S3,Cl,OH)2
Strunz: 
9.FB.10
Crystal System: 
Isometric
Hardness: 
5.0 - 5.5
Type Locality: 
Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine; Lapis-lazuli deposit), Sar-e Sang (Sar Sang; Sary Sang), Koksha Valley (Kokscha Valley; Kokcha Valley), Khash & Kuran Wa Munjan Districts, Badakhshan Province (Badakshan Province; Badahsan Province), Afghanistan
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