Regal in ruby. Royalty Inspired by Effy Collection's stunning ring makes an oval-cut ruby (5-3/4 ct. t.w.) the focal point amidst a circle of round-cut diamonds (1-5/8 ct. t.w.). Crafted in 14k gold. Almost all gemstones and blue and black diamonds have been treated to enhance their beauty and require special care. All gemstone carat weights (ct. t.w.), if mentioned, are approximate; variance may be .05 carat. Ring Sizer.