Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Distinct on {100} and {110}
{010} moderate, {100} imperfect
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)