Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
Mg 3(SiO 4)(F,OH) 2Anthony et al , Handbook of Mineralogy (2001)