Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references