Yellow, Reddish, Brown, Brownish, Green, gray, Colorless
Colorless, White, Brownish, Reddish, Black, Brownish, Black, Colorless, gray, White, Reddish, Brown
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Uneven
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
Na 3AlF 6Ulrich Henn and Claudio C.