Uneven, Conchoidal, UnevenArthur Thomas, Brittle
UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CoAsSAnthony et al , Handbook of mineralogy (2001)