A photograph taken on May 7, 2026 shows a triangular-shaped fancy vivid blue-green diamond weighing 5.50 carats, known as "The Ocean Dream", displayed during a press preview at Christie’s auction house in Geneva. The Ocean Dream, presented by Christie`s as the largest fancy vivid blue-green diamond known to exist and valued 7,000,000 to 10,000,000 CHF (7,649,084 to 10 927 222 euros) will be offered during the Magnificent Jewels auction, on May 13, 2026. (Photo by Fabrice COFFRINI / AFP)