Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.843.85-3.94
1
7.18
👆🏻
Fracture
Subconchoidal, Conchoidal
Conchoidal, Uneven
Cleavage
{0001} good, {10 1 0} parting
{010} Good, {100} Distinct
Mohs Hardness
7.5-85-5.5
2
10
👆🏻
Chemical Composition
(Ca,Ce)(Al,Ti,Mg)12O19
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)