1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.64-2.692.32-2.38
1
7.18
2.5 Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
2.6 Cleavage
Not Available
Not Available
2.7 Mohs Hardness
2.11 Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2(+Al 2O 3)Walter Schumann , Gemstones of the world (2001)