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

Christie's Much-Vaunted 'Bleu Royal' Diamond Fetches $43.8 Million

Top 10 Most Expensive Blue Diamonds - Haywoods Jewellery

ART-AUCTION/JEWELS-CHRISTIES

Bleu Royal' diamond fetches almost $44 million at Christie's

The Bleu Royal Diamond Could Fetch $50 Million at Auction

Royal Coster Diamonds

Bleu Royal' diamond expected to fetch $50m

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

Bleu Royal diamond set to dazzle in Geneva jewels sale

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

This largest internally flawless blue diamond could fetch US$50

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

Bleu Royal' diamond fetches almost $44 million at Christie's