Tenacity
-
-
Solubility
-
insoluble in water
Durability
-
-
Specific Gravity
3.85-3.942.51-2.63
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Fibrous
Cleavage
{010} Good, {100} Distinct
Perfect basal
Mohs Hardness
5-5.52.5-4.5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)