Tahitian pearls are also known as the black South Sea pearls or black pearls. They are grown in the waters of French Polynesia and can be very large in size. They come from the black-lip oyster Pinctada margaritifera. Tahitian pearls are the only natural black pearls in the world.
Tahitian pearls are also found in other colors such as silvery white, light and dark gray, blue, green, yellow, and purple. Black pearls tend to have pink or green overtones and have an almost metallic look.
Tahitian pearl mollusks also produce large keshi pearls with interesting shapes that can exceed 10 mm in length.
Tahitian pearls measure between nine millimeters and twenty millimeters in diameter.