Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.943.0-3.1
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{010} Good, {100} Distinct
Perfect on {001}
Mohs Hardness
5-5.53.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca(Mg,Al)3(Al3Si)O10(OH)2