Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Irregular
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
{100} imperfect, {110} indistinct; partings on {111} or {011}
Distinct on {110}, imperfect on {010}, poor on {001}