Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.945.85-6.15
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Conchoidal
Cleavage
{010} Good, {100} Distinct
Fair in four directions forming octahedrons
Mohs Hardness
5-5.53.5-4
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Cu 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references