10k Gold 8mm Checkerboard Cushion Semiprecious Gemstone 4-Prong Stud Earrings Simple and classic, these versatile studs are available in a variety of gemstone choices, allowing the wearer to showcase her birthstone or simply her favorite color. The natural properties and composition of mined gemstones define the unique beauty of each piece. The image may show slight differences to the actual stone in color and texture. Gemstones may have been treated to improve their appearance or durability and may require special care. Domestic.