The world’s largest blue diamond ever to come to auction has sold for 450,925,000 HKD, or $57.5 million.Named “The De Beers Cullinan Blue,” the massive 15.10-carat step-cut gem sold at Sotheby’s in Hong Kong after ...
One of the most valuable blue diamonds to ever feature at an auction could sell for more than $48 million, according to Sotheby’s.Named “The De Beers Cullinan Blue,” it is the biggest vivid blue diamond to ...