Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.55-9999
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None, but may exhibit slight parting
-
Mohs Hardness
7.5-8-9999
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
SiO2, Al2O3, CaO, MgO, FeO