UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 6B 5O 15(F,OH) 3Ulrich Henn and Claudio C.