World's largest and most valuable blue diamond up for auction - BBC Newsround
Largest blue diamond set to fetch US$48 million at Sotheby's Hong Kong auction
De Beers Cullinan Blue Sells at $57.5M at Sotheby's Hong Kong — Anne of Carversville
The De Beers Cullinan Blue Heads to Auction at Sotheybys
Sotheby's to present The De Beers Cullinan Blue diamond
The De Beers Blue Live Auction
De Beers 15-Carat Cullinan Blue Diamond Sold for $58 Million at Sotheby's - Bloomberg
The 15-Carat 'De Beers Blue' Diamond Fetches $57.4 Million
The De Beers Cullinan Blue Diamond Goes to Auction
Largest and most valuable blue diamond to come to auction at Sotheby's Hong Kong