Tenacity
-
-
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.85-3.943.62-3.87
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
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)
Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)