Tommaso Design Created Star Sapphire Ring 10kt Gold Metal: 10 kt White Gold. Dimensions: Width: 5.00 mm Length: 7.00 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. Additional Stones: (0.04 carat white-diamond, Shape: round-shape, Color: L-M, Clarity: I3, Creation: natural, Treatment: not-treated.)