Tommaso Design 7mm Round Genuine Peridot Pendant Necklace 14 kt White Gold Metal: 14 kt White Gold. Dimensions: Width: 7.00 mm Length: 12.00 mm This Classic creation is made by the renowned Tommaso Design Studio. Tommaso Design Studio, is a reputable American Family Business based in New York since 1986, uses the highest quality materials, and will proudly stand behind all of its products. Peridot: The Birthstone for August. From the Greek `Peridona` for `giving plenty`. A symbol of the sun, Peridot was worn by ancient Egyptians and Romans. It is thought to bring good luck, peace, protection and success. 18 inch Chain in a matching metal will be included Additional Stones: