18kt gold over sterling silver, sapphire and diamond ring for women. 1.00 ct. t.w. sapphire, 0.15 ct. t.w. diamond. 1/2" wide. Luxury 18kt gold over sterling silver ring. Round shape pink sapphire and round diamond. Polished 18kt gold over sterling silver. Includes jewelry presentation box. Due to the naturally occurring characteristics of gemstones, each is unique and may exhibit imperfections such as inclusions , blemishes and cloudiness, as well as color variations.