Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Fibrous
[001] good, [210] distinct
{001} perfect and {100} imperfect
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references