Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
Perfect on {001}, good on {210}, poor on {010}
Distinct on {110}, imperfect on {010}, poor on {001}