UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Irregular/uneven, UnevenArthur Thomas, Gemstones (2009)
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
CaAl 2Si 4O 12 -6H 2OArthur Thomas , Gemstones (2009)