Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.943.19-3.56
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven, Conchoidal
Cleavage
{010} Good, {100} Distinct
{110} Perfect, {010} Indistinct
Mohs Hardness
5-5.55.5-6
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)