5mm Natural London Blue Topaz Round Cut Diamond Ring 0.58 Carat Diamond. The diamonds are graded as SI Clarity and G-H Color. Handcrafted in your choice of 14k Gold, 18k Gold or Platinum 950 setting. We also offer a 1-Year Layaway program. You can reach us at 1-888-967-5353 to speak to one of our jewelry specialist.