Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
Perfect on {001}, very good on {010}, imperfect on {110}
Distinct on {110}, imperfect on {010}, poor on {001}