Tenacity
Solubility
Durability
Specific Gravity
Fracture
Cleavage
Mohs Hardness
Chemical Composition
Imperfect to indistinct on {10 1 0}, parting on {0001}
(Ce,La)(CO 3)FMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Perfect on {001}, very good on {010}, imperfect on {110}
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)