Indicolite (blue or blue-green) -- moderately scarce and expensive in fine qualities.

Rubellite (red) -- moderately scarce and expensive in fine qualities. Often badly included.

Bicolor or tricolor tourmaline -- shows multiple color zones throughout the crystal. Highly prized when the colors are well divided and vivid. Often badly included and subject to fracture along the color transition line.

Watermelon tourmaline -- has a red central core surrounded by green, resembling the cross section of a watermelon. Often cut in thin slices to show the colors to best advantage.

Schorl -- black tourmaline

Dravite -- brown tourmaline

Chrome tourmaline -- vivid green. Derives its color from chromium. Appears red when viewed through a Chelsea filter (emerald filter). Fairly scarce and expensive.

Achroite -- colorless tourmaline. Fairly rare

Pink Tourmaline

Cat’sEyeTourmaline

Yellow Tourmaline