Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.44-2.62
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
{010} Good, {100} Distinct
Indiscernible
Mohs Hardness
5-5.52.5-5.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
H 4Mg 3Si 2O 9Walter Schumann , Gemstones of the world (2001) More from other references