Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal
Distinct/good on {110}