Yellow, Reddish, Brown, Brownish, Green, gray, Colorless
Reddish, Greenish, White, Red, Yellow, Green, Grey, Blue, Brown, Colorless, gray, orange
Na 2(Ti,Fe)Si 4(O,F) 11Ulrich Henn and Claudio C.
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references