Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
Not Available
2.32-2.38
Fracture
Not Available
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Not Available
Not Available
Mohs Hardness
Not Available
5.5
Chemical Composition
Not Available
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)
