Largest blue diamond at Sotheby's auction expects $48 million(1/4)

A 15.10-carat blue diamond is displayed before going for auction at Sotheby's, New York City, Feb. 15, 2022. It is the largest vivid blue diamond ever to appear at auction and expected to fetch more than $48 million. (Photo/ICphoto)

A 15.10-carat blue diamond is displayed before going for auction at Sotheby's, New York City, Feb. 15, 2022. It is the largest vivid blue diamond ever to appear at auction and expected to fetch more than $48 million. (Photo/ICphoto)

A 15.10-carat blue diamond is displayed before going for auction at Sotheby's, New York City, Feb. 15, 2022. It is the largest vivid blue diamond ever to appear at auction and expected to fetch more than $48 million. (Photo/ICphoto)

A 15.10-carat blue diamond is displayed before going for auction at Sotheby's, New York City, Feb. 15, 2022. It is the largest vivid blue diamond ever to appear at auction and expected to fetch more than $48 million. (Photo/ICphoto)