Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.25-2.402.78
1
7.18
👆🏻
Fracture
-
Uneven, Conchoidal
Cleavage
perfect on {010}; good on {100}
{???} Distinct, {???} Indistinct
Mohs Hardness
5-5.55-6
2
10
👆🏻
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
3CaAl 2Si 2O 8 · CaCO 3Anthony et al , Handbook of mineralogy (2001)