Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.62-4.203.85-3.94
1
7.18
👆🏻
Fracture
-
Conchoidal, Uneven
Cleavage
None
{010} Good, {100} Distinct
Mohs Hardness
7-7.55-5.5
2
10
👆🏻
Chemical Composition
(Fe,Mg) 3Al 2(SiO 4) 3gemdat.org , Management Team (2012)
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)