A rare purplish-red diamond ring has sold for 2.97 million Swiss francs (1.27 million pounds), setting a world record for a red diamond, Christie's said.
British jeweller Laurence Graff bought the ring whose octagonal stone weighs 2.26 carats and is the largest red diamond to appear at auction, it said.
The previous record for a red diamond, considered the rarest of coloured diamonds, was a 1.92 carat gem that sold for more than $1.6 million (783,000 pounds) in 2001, according to the auction house which held a semi-annual jewellery sale in Geneva on Thursday night.
An emerald and diamond necklace, which belonged to German Princess Katharina Henckel von Donnersmarck at the end of the 19th century, sold for just over 2 million Swiss francs to an anonymous bidder.
In all, Christie's jewellery sale netted 53.9 million Swiss francs, with 80 percent of the nearly 400 lots on offer finding new owners.
"After nearly a billion dollars of art changed hands at Christie's New York in the last two weeks, the jewellery sale at Christie's Geneva demonstrated the same trend with spectacular prices achieved for exceptional jewels and gemstones," said Eric Valdieu, director of Christie's jewellery department in Geneva.
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