Colorless, White, Brownish, Reddish, Black, Brownish, Black, Colorless, gray, White, Reddish, Brown
Brown, Reddish, pink, orange
Na 3AlF 6Ulrich Henn and Claudio C.
Mn2+9(SiO 4) 4(OH,F) 2Anthony et al , Handbook of mineralogy (2001)
Gemmological Tables (2004) More from other references
TransparentAnthony et al, Handbook of mineralogy (2001)