Uneven, Conchoidal, Conchoidal to uneven, Brittle
UnevenWalter Schumann, Gemstones of the world (2001) More from other references, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Uneven
On {10 1 1} perfect; parting on {10 1 2}
{110} Perfect, {110} Perfect, {110} Perfect
MnCO3
(Zn,Fe)SMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references