Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.79-3.943.85-3.94
1
7.18
👆🏻
Fracture
Lamellar, Splintery
Conchoidal, Uneven
Cleavage
{100} Good, {001} Good, {010} Poor
{010} Good, {100} Distinct
Mohs Hardness
45-5.5
2
10
👆🏻
Chemical Composition
FeAs
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)