Tenacity
-
-
Solubility
-
-
Durability
-
-
Specific Gravity
2.32-2.38-9999
1
7.18
👆🏻
Fracture
ConchoidalWalter Schumann
-
Cleavage
None
-
Mohs Hardness
5.5-9999
2
10
👆🏻
Chemical Composition
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
SiO2, Al2O3, CaO, MgO, FeO