Tenacity
-
Brittle
Solubility
-
insoluble
Durability
-
-
Specific Gravity
3.85-3.946.86-7.03
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
{010} Good, {100} Distinct
{100} imperfect, {110} indistinct; partings on {111} or {011}
Mohs Hardness
5-5.56-7
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references