Subconchoidal, Uneven, Conchoidal, Uneven
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
CaBe 2(PO 4) 2Michael OâDonoghue , Gems, Sixth Edition (2006)