Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.943.28-3.38
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Splintery, Fibrous
Cleavage
{010} Good, {100} Distinct
Good on [110]
Mohs Hardness
5-5.56.5-7
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
NaAlSi 2O 6Ulrich Henn and Claudio C.