18ct White Gold 0.37ct Ruby and Diamond Cushion Stud Earrings. 03-13-139. These classically styled earrings feature stunning oval cut Ruby centre stones, which are framed with 0.15cts of brilliant cut white diamonds. Exquisitely crafted from 18ct gold with multigrain detailing, and completed with secure post and butterfly fittings. At C W Sellors, we have an expert team of gemstone and diamond specialists who handpick and grade each jewel to meet our high standards and a team of talented in house designers who combine their talents to bring you our exclusive Precious Gemstone collection. You can find other Ruby pieces online and in store to compliment these earrings. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.