Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.69-2.792.30-2.50
1
7.18
👆🏻
Fracture
Conchoidal
Uneven
Cleavage
Poor on {0001}
Perfect on (001)
Mohs Hardness
5.5-6.54.5-5
2
10
👆🏻
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.