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Afghanite With Calcite

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BNG739745

Afghanite With Calcite

Fluorescent

Description Tabs

Description
Locality: 
Ladjuar Madan, Kokcha Valley, Badakhshan Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 6.2 × 4 cm
Description

Super well terminated perfect blue afghanite crystals combine with calcite make a unique example,this is very rare from the locality.

A really rare and unique specimen.

Mineral Data
What's on the rock

Afghanite

Formula: 
(Na,Ca,K)8(Al6Si6O24)(Cl2,SO4,CO3)3·0.5H2O
Strunz: 
9.FB.05
Crystal System: 
Hexagonal
Hardness: 
5.5 - 6.0
Streak: 
white
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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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