Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Uneven, Conchoidal, Brittle
(Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)