Uneven, Conchoidal to uneven, Brittle, Metallic, Uneven, ConchoidalWalter Schumann, Brittle, Metallic
Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)
Distinct on {110}, imperfect on {010}, poor on {001}
Perfect {010}, imperfect {100}