1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.5 Fracture
Not Available
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
1.6 Cleavage
Perfect in one direction, indistinct in one direction
Good on {110}, poor on {100}
1.7 Mohs Hardness
1.8 Chemical Composition
Not Available
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references