The De Beers Blue is probably one of a select group of rare diamonds originating in the deepest parts of the earth, according to researchers at the Gemological Institute of America (GIA).The stone has important similarities with the Hope and Wittelsbach-Graff diamonds, two other blue, type IIb.
The De Beers Cullinan Blue is probably one of a select group of rare diamonds originating in the deepest parts of the earth, according to researchers at the Gemological Institute of America (GIA).The stone has important similarities with the Hope and Wittelsbach-Graff diamonds, two other blue,.
The world's largest blue diamond, the 15.10-carat "De Beers Cullinan Blue," sold for $57.5 million during an auction at Sotheby's in Hong Kong this week
The world's largest blue diamond, the 15.10-carat "De Beers Cullinan Blue," sold for $57.5 million during an auction at Sotheby's in Hong Kong this week
A record blue diamond co-owned by De Beers far outstripped its presale estimate in a stand-alone sale at Sotheby’s in Hong Kong, garnering HKD 450.9 million ($57.5 million), the auction house said Wednesday.
The step-cut, 15.10-carat, fancy-vivid-blue, internally flawless stone, called the.