Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)