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Hackmanite With Calcite

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KRM74769

Hackmanite With Calcite

Description Tabs

Description
Locality: 
Koksha Valley, Badakhshan Province, Afghanistan
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.8 × 1.9 cm
Description

Good coloured hackmanite with calcite. 

There is no damage to the hackmanite crystal except  etching to the back side. 

Mineral Data
What's on the rock

Hackmanite

Variety Of: 

Sodalite

Formula: 
Na8(Al6Si6O24)Cl2
Strunz: 
9.FB.10
Hardness: 
5.5 - 6.0
Formula: 
Na8Al6Si6O24(Cl2,S)
Hardness: 
0.0

Calcite

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

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