Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.25-2.403.87-4.14
1
7.18
👆🏻
Fracture
-
Subconchoidal, Conchoidal
Cleavage
perfect on {010}; good on {100}
Poor on {120}, in traces on {001}
Mohs Hardness
5-5.55.5-6
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references