UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic
Uneven, Uneven, Gems, Sixth Edition (2006)
{100} Good, {010} Good, {001} Good
2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal