A rare 5.5-carat blue-green diamond ring, named Ocean Dream, sold for over $17 million at Christie’s Magnificent Jewels auction in Zurich on May 13, 2026. The triangular-cut stone, estimated at $9–12 million, is set in an 18-karat white gold band with pink and white diamonds. The buyer was an unnamed private client, and the ring took 20 minutes to sell. It had previously fetched nearly $10 million at Christie’s Geneva in 2014.
The sale underscores the enduring demand for exceptionally rare colored diamonds at auction, with Ocean Dream being described by the Smithsonian as one of the eight rarest diamonds in the world. The Gemological Institute of America confirmed it as the largest Fancy Vivid blue-green diamond of natural color it has examined. The auction, which included 87 lots from houses like Cartier and Van Cleef & Arpels, achieved a total of $66 million, highlighting the strength of the high-end jewelry market.