1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.95-4.033.87-4.14
1
7.18
1.3 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.5 Cleavage
None, but may exhibit parting
Poor on {120}, in traces on {001}
1.6 Mohs Hardness
1.10 Chemical Composition
Al 2 O 3
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references