1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.5 Specific Gravity
2.60-2.652.55-2.70
1
7.18
1.8 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Not Available
1.9 Cleavage
Perfect on {001}, very good on {010}, imperfect on {110}
Not Available
1.10 Mohs Hardness
1.11 Chemical Composition
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2Arthur Thomas , Gemstones (2009)