Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.05-3.083.85-3.94
1
7.18
👆🏻
Fracture
Subconchoidal, Uneven, Conchoidal
Conchoidal, Uneven
Cleavage
Poor on {100}
{010} Good, {100} Distinct
Mohs Hardness
55-5.5
2
10
👆🏻
Chemical Composition
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)