Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
-99993.7-3.9
1
7.18
👆🏻
Fracture
-
Conchoidal
Cleavage
-
{001} perfect; {111} imperfect, may exhibit parting on , {011}
Mohs Hardness
-99995.5-6
2
10
👆🏻
Chemical Composition
SiO2, Al2O3, CaO, MgO, FeO
MgOMichael OâDonoghue , Gems, Sixth Edition (2006)