Yellow, Greenish, Brownish, Colorless, White, gray, Green, Blue, Violet, orange
Colorless, Greenish, Green, gray, Yellow
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Ca 2Al 3(SiO 4) 3(OH)Walter Schumann , Gemstones of the world (2001) More from other references