Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
On {10 1 0}, perfect; parting on {000 1 }
(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)
{111} Indistinct, {111} Indistinct, {111} Indistinct
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)