Tenacity
Brittle
-
Solubility
-
-
Durability
-
-
Specific Gravity
5.50-5.90-9999
1
7.18
👆🏻
Fracture
Conchoidal
-
Cleavage
On {10 1 0}, perfect; parting on {000 1 }
-
Mohs Hardness
4-9999
2
10
👆🏻
Chemical Composition
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
SiO2, Al2O3, CaO, MgO, FeO