ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
SbTaO 4Ulrich Henn and Claudio C.
(Ca,Mg,Mn)SiO 3Gemdat.org , Management Team (2012)