Bleu Royal: Vivid blue diamond could fetch over $50 million at

Christie's hopes Bleu Royal's final bid will surpass Oppenheimer Blue's, which fetched over $57 million in 2016

Royal Coster Diamonds

This Rare Gem Could Sell for $50M

This 17-Carat 'Bleu Royal' fancy vivid blue diamond could fetch US

Bleu Royal diamond set to dazzle in Geneva jewels sale - Life

17-Carat 'Bleu Royal' Fancy Vivid Blue Diamond Could Fetch $50 Million

Bleu Royal' Diamond to Fetch $35M-$50M at Auction

blue diamond – The Diamond Certification Laboratory of Australia

Christie's sells rare blue diamond for over $40m

blue diamond – The Diamond Certification Laboratory of Australia

Vivid blue diamond could sell for $50 million at Christie's

ART-AUCTION/JEWELS-CHRISTIES

Record-breaking 'Bleu Diamond' to be sold for upto $50 million at