1 Physical Properties
1.1 Tenacity
1.2 Solubility
1.5 Durability
Not Available
Not Available
1.8 Specific Gravity
2.5 Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Irregular/uneven
2.6 Cleavage
Good on {110}, poor on {100}
Perfect cleavage parallel to base and prism faces: {001} Perfect, {210} Perfect, {010} Imperfect
2.7 Mohs Hardness
2.14 Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Not Available