White, Colorless, Blue, Red, Green, Yellow, Violet
Colorless, Reddish, White, pink, Green, Yellow, Violet, White, pink, Green, Yellow, Violet, White, Colorless, Blue, Green, Brown, Yellow, pink, Violet, White, pink, Green, Yellow, Violet
ConchoidalArthur Thomas, Gemstones (2009)
Uneven, UnevenArthur Thomas, Gemstones (2009)
Tourmaline is a series of several different minerals with unique chemical formulas.
KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.