It takes two years for an oyster to mature enough to begin producing pearls. . The cultured Tahitian pearl comes in various shapes, sizes, and colors; shapes include round, semi-round, button, circle, oval, teardrop, semi-baroque and baroque.Because of their darker hues, Tahitian pearls are commonly known as "black pearls". However, Tahitian pearls have the ability to contain various undertones and overtones of green, pink, blue, silver and yellow. All (or any combination) of these colors may be seen in a cultured Tahitian pearl. Due to the variety of shapes and colors of the Tahitian pearl, it has been known to fit in any jewelry setting. The versatility and mixture of color give it its value. Lovely Noa Beaded Tahitian Pearl Necklace with silver accents, Spring ring closure. * Pearl diameter: 9 - 10 mm * Item length: 40 cm Color: Silver and Multi-colored Material: Silver and Tahitian Pearl Origin: Manufactured in Tahiti Box included Size is listed as Inch