Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.252.69-2.79
1
7.18
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Fracture
-
Conchoidal
Cleavage
Imperfect in one direction
Poor on {0001}
Mohs Hardness
5-5.55.5-6.5
2
10
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Chemical Composition
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references