18ct White Gold Ruby and Diamond Star Necklace. P3184. This feminine 18ct white gold pendant features 0.84cts of luxurious rubies and 0.18cts of sparkling diamonds set in playful star design. The pendant is presented on an 18 inch 18ct white gold chain with a bolt ring clasp. 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 and diamond pieces online and in store to compliment this necklace. All articles purchased from C W Sellors are lovingly and securely dispatched with our elegant jewellery packaging.