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
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
distinct/good on {1011}
1.7 Mohs Hardness
1.8 Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)