Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
{100} imperfect, {110} indistinct; partings on {111} or {011}
{0001} good, {10 1 0} parting