Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.25-2.403.25
1
7.18
👆🏻
Fracture
-
-
Cleavage
perfect on {010}; good on {100}
Imperfect in one direction
Mohs Hardness
5-5.55-5.5
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaCuAlSi 2O 6(OH) 3Michael OâDonoghue , Gems, Sixth Edition (2006)