Tenacity
-
-
Solubility
insoluble in water
-
Durability
-
-
Specific Gravity
2.51-2.633.85-3.94
1
7.18
👆🏻
Fracture
Fibrous
Conchoidal, Uneven
Cleavage
Perfect basal
{010} Good, {100} Distinct
Mohs Hardness
2.5-4.55-5.5
2
10
👆🏻
Chemical Composition
Mg 3(Si 2O 5)(OH) 4Gemdat.org , Management Team (2012)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)