Tenacity
Elastic
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.9-3.12.69-2.79
1
7.18
👆🏻
Fracture
Uneven
Conchoidal
Cleavage
Perfect basal {001}
Poor on {0001}
Mohs Hardness
3.5-4.05.5-6.5
2
10
👆🏻
Chemical Composition
-
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references