UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
CoAsSAnthony et al , Handbook of mineralogy (2001)
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)