1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.2 Durability
Not Available
Not Available
1.5 Specific Gravity
2.60-2.653.97-4.05
1
7.18
1.15 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Conchoidal
1.16 Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
No true cleavage
1.17 Mohs Hardness
1.18 Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2 O 3