White, Colorless, Blue, Red, Green, Yellow, Violet
Yellow, Greenish, Brownish, Colorless, White, gray, Yellow, Green, Blue, Violet, Blue, Colorless, Green, gray, Yellow, Blue, Colorless, Green, gray, Yellow, orange
ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Tourmaline is a series of several different minerals with unique chemical formulas.
PbSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references