Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.65
Not Available
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Not Available
Cleavage
3,1
Not Available
Mohs Hardness
7
Not Available
Chemical Composition
SiO 2Ulrich Henn and Claudio C.
Not Available
