Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.71-2.72
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Fibrous
Cleavage
{010} Good, {100} Distinct
{???} Good
Mohs Hardness
5-5.56-6.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)