Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.941.79
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Irregular/uneven
Cleavage
{010} Good, {100} Distinct
Perfect on {10bar10}
Mohs Hardness
5-5.52.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12•26(H2O)