1 Physical Properties
1.1 Tenacity
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect [001] good [010] poor [110]
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Arthur Thomas , Gemstones (2009)