Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.
Indistinct parting on [111]
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)