Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.792.77
1
7.18
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Fracture
Conchoidal
Uneven
Cleavage
Poor on {0001}
Perfect [001] good [010] poor [110]
Mohs Hardness
5.5-6.56-6.5
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)