Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.54-2.782.69-2.79
1
7.18
👆🏻
Fracture
Conchoidal
Conchoidal
Cleavage
Good in three directions
Poor on {0001}
Mohs Hardness
5-65.5-6.5
2
10
👆🏻
Chemical Composition
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references