Reddish, Greenish, White, Red, Yellow, Green, Grey, Blue, Brown, Colorless, gray, orange
Red, Reddish, Violet, Blue, Green, Colorless, pink
Distinct on {010}, imperfect {110} and {011}
{010} Perfect, {001} Distinct
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Fe3+ PO 4 · 2H 2OAnthony et al , Handbook of Mineralogy (2001)