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Afghanite With Calcite

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BNG625068

Afghanite With Calcite

Description Tabs

Description
Locality: 
Auraghuq, Badakhshan Province, Afghanistan
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
17 × 5.4 × 4.7 cm
Largest Crystal: 
1.60cm
Description

Amazing ink blue afghanite with combine calcite,the afghanite crystal hosted on calcite.

 

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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