Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Fibrous
Not Available
CaAl 2(Fe3+ ,Al)Si 3O 12(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(Mg,Fe)Al 2O 4Gemdat.org , Management Team (2012)