Largest blue diamond ever auctioned fetches $57.6 mn

Canada-based mining company Lucara Diamond had announced that it had sold a huge uncut 813-carat diamond 'The Constellation' for a record-breaking $63 million.

Dubai-based Nemesis International DMCC, a rough-diamond trading company, had bought the stone at a price of $77,649 per carat.

'The Constellation', world's second largest uncut diamond, was reportedly unearthed in 2015 in Botswana; no other details of the sale were revealed.

Sotheby's auction house had sold the 15.38-carat 'Unique Pink' stone; an Asian private buyer had paid up a record-breaking $32 million for the stone.

Ehud Laniado, President-Cora International (seller of the 'Unique Pink' stone), said that the stone's value would increase over time; she was however satisfied with the sale price.

Sotheby's had also auctioned a 7.32-carat blue diamond for $17.1 million.

The dazzling 14.62-carat Oppenheimer Blue diamond, which was once owned by Sir Philip Oppenheimer, has been sold during an auction in Geneva.

The largest stone of the exceptionally rare Fancy Vivid Blue class fetched a record-breaking $57.6 million from an anonymous buyer at auction house Christie's.

A Christie's spokesman stated that it was the jewel of all records and over hundreds attended the auction.

Reportedly, the blue colored beauty's pre-auction valuation was set between $38-45 million; the most expensive polished diamond easily topped the pre-auction value.

Alexandra Kindermann, a Christie's spokeswoman, said that the bidding for the Oppenheimer Blue, which Sir Oppenheimer presented to his wife, lasted no more than 25 minutes.

The blue diamond was set in a ring with two small trapezoid-shaped diamonds on its sides.

Oppenheimer Blue has made its first ever appearance at a public auction; however, the blue stone passed through many hands after Sir Philip Oppenheimer's death.

According to Jean-Marc Lunel–Christie's diamond expert, Fancy Vivid Blue class stones are usually small and weigh about five carats.

Raymond Sancroft-Baker, Director (Europe)–Christie's, said that no other blue diamond ever sold had the quality like that of Oppenheimer Blue.

The Oppenheimer Blue was named after its first owner, Sir Philip Oppenheimer; he died on 8 October 1995 in London at an age of 85.

He belonged to a family that manages the De Beers Mining Company and was knighted in 1970.

He was a former chairperson of London's Central Selling Organization and oversaw DeBeers diamond marketing cartel to keep price swings under control.