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
ConchoidalGemdat.org, Uneven
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
1.6 Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Perfect on {001}, very good on {010}, imperfect on {110}
1.7 Mohs Hardness
1.8 Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)