1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Not Available
1.6 Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Not Available
1.7 Mohs Hardness
1.8 Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
BeAl 2O 4Arthur Thomas , Gemstones (2009)