Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.943.62-4.20
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
-
Cleavage
{010} Good, {100} Distinct
None
Mohs Hardness
5-5.57-7.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mg) 3Al 2(SiO 4) 3gemdat.org , Management Team (2012)