Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
2.32-2.385.50-5.90
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
Conchoidal
Cleavage
None
On {10 1 0}, perfect; parting on {000 1 }
Mohs Hardness
5.54
2
10
👆🏻
Chemical Composition
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)