Color
White, Colorless, Blue, Red, Green, Yellow, Violet
Blue, Red, Yellow, Colorless, Green, White
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas.
Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references