Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Fe 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
SbTaO 4Ulrich Henn and Claudio C.