Colorless, White, Brownish, Reddish, Black, Brownish, Black, Colorless, gray, White, Reddish, Brown
Violet, Blue, Yellow, Brown, White, Colorless
Uneven
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001)
Na 3AlF 6Ulrich Henn and Claudio C.
Ca 5(PO 4) 3FAnthony et al , Handbook of mineralogy (2001)