Conchoidal, Brittle, Conchoidal
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
SbTaO 4Ulrich Henn and Claudio C.