The main varieties of tourmaline are:
By Color: Tourmaline is known for its wide range of colors, making it one of the most colorful gemstones in the world. Due to its complex chemical composition, tourmaline can exhibit a variety of hues. In the international jewelry industry, commercial tourmaline varieties are often categorized by their color.
Red Tourmaline: This term refers to pink to red-colored tourmalines. Red is considered the most valuable among all tourmaline colors, with the most desirable being shades of purple and rose red, which are commonly called "red tourmaline." In China, it's sometimes referred to as “baby face†due to its soft and appealing appearance. However, natural specimens often display more brownish, maroon, or deep red tones, with significant variations in color intensity.
Green Tourmaline: This category includes yellow-green, dark green, and blue-green tourmalines, as well as those with brownish tones. Green tourmaline is popular in both fine and affordable jewelry, offering a vibrant and versatile option for designers.
Blue Tourmaline: This refers to tourmalines that range from light blue to deep blue. Blue tourmaline is less common than other colors but highly sought after for its unique and striking appearance.
Multicolor Tourmaline: One of the most fascinating features of tourmaline is its ability to display multiple colors within a single crystal. Due to the development of growth zones, you can often find red and green dichroic ribbons, or even trichromatic ribbons. In some cases, the colors may form a circular pattern from the center outward, with the inner part appearing green and the outer part red — this unique type is known as "Watermelon Tourmaline."
By Optical Effects:
Tourmaline Cat’s Eye: When tourmaline contains numerous parallel fibrous or tubular inclusions, it can produce a cat’s eye effect when cut into a cabochon. This rare and beautiful optical phenomenon gives the stone a distinctive shimmer, resembling the eye of a cat.
Color-Changing Tourmaline: This is a rare and special variety of tourmaline that changes color under different lighting conditions. It is similar to color-changing sapphire but much rarer. These stones are highly prized by collectors and connoisseurs for their unique and mesmerizing properties.
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