Subconchoidal, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
TiO 2Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
SbTaO 4Ulrich Henn and Claudio C.