Tourmaline: Tourmaline is found in a wide range of colors from vivid pinks to verdant greens to Caribbean blue. Tourmaline is dichroic which means that a single gemstone displays two colors. Tourmaline is the alternate birthstone for October. Tourmalines are mined in Brazil, Afghanistan, East Africa, and the United States.  Tourmaline rates 7 to 7 1/2 on the Mohs scale of hardness.

Enhancements: Although cutting is the most basic enhancement method necessary to display the beauty of a gemstone, there are many fascinating methods by which man has demonstrated his ability to draw maximum color, luster, clarity and brilliance from nature's earthbound treasures. A basic understanding of these enhancement techniques will add to your appreciation of the beauty, durability and value of the gemstone jewelry you already own, or plan to purchase in the future. Dark blue, blue-green, and green tourmalines are occasionally heated to lighten their color. Red tourmalines (or rubellite) and pink varieties are often heated or irradiated to permanently improve their colors.

Tourmaline care: Do not use an ultrasonic cleaner. Avoid sudden temperature changes, steaming and contact with cosmetics, hairspray, perfume or household chemicals. Your tourmaline jewelry may be cleaned with a soft-bristled brush or a cloth with plain or soapy water.