Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.24-2.293.85-3.94
1
7.18
👆🏻
Fracture
Uneven, Subconchoidal, Conchoidal
Conchoidal, Uneven
Cleavage
Very poor [100]
{010} Good, {100} Distinct
Mohs Hardness
5-5.55-5.5
2
10
👆🏻
Chemical Composition
NaAlSi 2O 6 · H 2OMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)