Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
Distinct on {100} and {110}
{100} imperfect, {110} indistinct; partings on {111} or {011}
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references