3.01ct Natural Fancy Vivid Yellow Diamond Ring by Tiffany & Co.Diamond engagement ring by Tiffany & Co, crafted in platinum, featuring in the center 3. 01ct Natural Fancy Vivid Yellow round brilliant cut diamond, framed with a double halo of beautifully set with milgrain finished, round brilliant cut diamonds, and adorned with pave set diamonds half way around the shank. The back of the ring is decorated with intricate open work floral design, and encrusted with diamonds. Ring size 6. 25 Round Brilliant Cut