Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
3.65-4.552.34-2.51
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
None, but may exhibit slight parting
None
Mohs Hardness
7.5-8-9999
2
10
👆🏻
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
SiO2, Al2O3, FeO, MgO, CaO, K2O, Na2O