Sat 30 April 2022: After purchasing the world’s largest blue diamond ever offered at auction, a collector has given new meaning to the expression “feeling blue.” According to the auction house, the De Beers Cullinan Blue, a 15.10-carat step-cut diamond, was sold by telephone to an anonymous buyer on Wednesday at Sotheby’s in Hong Kong. … Continue reading THE DE BEERS CULLINAN BLUE DIAMOND SHATTERS, SELLS FOR $57.5 MILLION