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
1.98-2.503.95-4.10
1
7.18
1.13 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Uneven, Uneven, Gems, Sixth Edition (2006)
1.14 Cleavage
Not Available
Not Available
1.15 Mohs Hardness
5.5-6.5Not Available
2
10
1.16 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)