ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, Conchoidal, UnevenArthur Thomas, Brittle
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references