Some tourmaline gems may contain two or more distinctive colors and are commonly known as bi-color tourmalines. Bi-color tourmaline gemstones occur in a number of color combinations and show multiple color zones throughout the crystal. Bi-color tourmalines are highly prized when the color zoning is well defined and the colors are vivid.

Bicolor Tourmaline is a unique miracle of color. Often two or more colors are found in a single tourmaline crystal making a bi-color tourmaline. Also rare are tourmaline gems which appear to change their color and cat's eye fancy tourmalines.

Bicolor Tourmaline has become a favorite in jewelry because it is available in so many colors. The bi-color stones are usually cut in rectangular or emerald cuts to highlight the color zoning. Bi-Color Tourmaline is one of the most sought after members of the tourmaline gemstone family.