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Hackmanite
Hackmanite

Goshenite
Goshenite



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Hackmanite
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Goshenite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.27-2.33
-
Perfect
5.5-6
Na 8Al 6Si 6O 24Cl 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
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-
-
2.60-2.90
Conchoidal
3,1 basal
7.5-8
Be3Al2SiO6