Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.25-2.402.69-2.79
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
perfect on {010}; good on {100}
Poor on {0001}
Mohs Hardness
5-5.55.5-6.5
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 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