Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
{110} good, 100 moderate, parting on {092} and {011}
Distinct on {110}, imperfect on {010}, poor on {001}