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Hackmanite
Hackmanite

Ceylonite
Ceylonite



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Hackmanite
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Ceylonite
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)
 
-
-
-
3.63-3.9
Conchoidal, Uneven
Indistinct
7.5-8
(Mg,Fe2+ )Al 2O 4Gemdat.org , Management Team (2012) More from other references