perfect along [010] and [100]
Has perfect cleavage on {001} and good cleavage on {010}. Cleavages intersect at 90°.
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
KAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references