Tiffany & Co. 0.90ct F/VS2 Round Brilliant Diamond Engagement RingSave over 40% on new RRP 12,800. 00. A truly stunning 0. 90ct F VS2 Tiffany Setting Diamond Engagement Ring. The colourless Tiffany diamond displays fabulous fire and sparkle; there's perhaps never a better way to propose than with this classic Tiffany & Co. ring. This example is in incredible Proposal Ready condition, has strong clear stamps and hallmarks and, having been carefully serviced and polished by our workshop, is indiscernible from the day