Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Good on {110}, (110) ^ (1 1 0) ≈87°; parting on {100}
(Na,Fe,Ca)Si 2O 6Ulrich Henn and Claudio C.
{110} Perfect, {110} Perfect, {110} Perfect
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references