Sotheby’s will auction a stone described as “the largest vivid blue diamond ever to appear at auction” on April 27 in Hong Kong.
Sotheby’s estimates that it could bring $48 million.
The 15.1 carat step-cut blue was cut from a rough stone discovered in April 2021. It is “the largest internally flawless step cut vivid blue diamond that the Gemological Institute of America (GIA) has ever graded,” according to a press statement.
“This diamond ranks as one of the best De Beers has ever seen,” said Bruce Cleaver, CEO of De Beers Group. “It is extremely rare and unique, and as the Home of Diamonds, De Beers is pleased to join together with Sotheby’s to bring this diamond to the world.”
Only five blue diamonds over 10 carats have ever come to auction, Sotheby’s notes. Until now, none has exceeded 15 carats.
“Blue diamonds of any kind are rare on the market, but this is the rarest of the rare; nothing of remotely similar calibre has appeared at auction in recent years,” says Patti Wong, chairwoman of Sotheby’s Asia. “Hundreds of millions of years in the making, this extraordinary blue diamond is surely one of nature’s finest creations.”
Advertisement
The diamond comes from the Cullinan mine in South Africa.
The Cullinan Blue could bring $48 million at auction. Photo: Sotheby’s
Ready to Relocate? Wilkerson Makes Your Move Seamless
When Brockhaus Jewelry decided to leave their longtime West Main Street storefront for a standalone building elsewhere in Norman, Oklahoma, owners John Brockhaus and Brad Shipman faced a familiar challenge: how to efficiently reduce inventory before the big move. Their solution? Partnering with liquidation specialists Wilkerson for a second time.
"We'd already experienced Wilkerson's professionalism during a previous sale," Shipman recalls. "But their approach to our relocation event truly impressed us. They strategically prioritized our existing pieces while tactfully introducing complementary merchandise as inventory levels decreased." The carefully orchestrated sale didn't just meet targets—it shattered them.
Asked if they'd endorse Wilkerson to industry colleagues planning similar transitions—whether relocating, retiring, or refreshing their space—both partners were emphatic in their approval. "The entire process was remarkably straightforward," Shipman notes. "Wilkerson delivered a well-structured program, paired us with a knowledgeable advisor, and managed every detail flawlessly from concept to completion."
