Photos: Rare 15.1-carat blue diamond fetches nearly $57.5M at auction NEW YORK, NEW YORK - FEBRUARY 15: The De Beers Cullinan Blue diamond is shown before being auctioned at Sotheby's on February ...

4-carat fancy intense blue diamond sells for $3.6 million Courtesy of Bonhams The second highest value lot sold at Wednesday’s auction was a 9.61-carat Kashmir sapphire single-stone ring.

Other singular standouts include a 20.1-carat diamond ring (estimated at up to $1.2 million), a pair of Harry Winston spinel and diamond earrings ($400,000 to $600,000), and an Art Deco sapphire ...

A 15.1-carat fancy vivid blue diamond is projected to be auctioned for a whopping $48 million — the highest estimate ever for a blue diamond.. The gemstone — known as the De Beers Cullinan ...

A 5.7-Carat Blue Diamond Ring Just Fetched Nearly $9 Million at Auction The jewel surpassed its pre-auction high estimate to become the second most expensive sold at auction globally this year ...

The previous record-holder for the most expensive blue diamond to sell at auction was the 15.10-carat Fancy Vivid De Beers Blue, which sold for $57.5 million at Sotheby's in Hong Kong in April ...

A 303.10 carat pear-shaped Fancy Deep Brownish Yellow Diamond is on display during an exhibition in Abu Dhabi, United Arab Emirates, Tuesday, April 8, 2025. (AP Photo/Altaf Qadri) ...