Diamond fetches $33.5m at Christie's auction in Geneva

A diamond necklace featuring a flawless 163-carat diamond - the largest of its kind to be auctioned - has fetched $33.5m at a Christie's event in Geneva on Tuesday evening.

The necklace, named The Art of de Grisogono, sold for $33.5m - $29.5m plus $4m premium - exceeding pre-sale predictions of $30m. The buyer's identity has not been revealed.
The 163-carat stone is the centerpiece of an emerald and diamond studded necklace.
The necklace is expected to be sold for up to $35 million.
This stone discovered past year in Angola is so pure and so large that even Christie's jewellery director David Warren can't contain his enthusiasm.
The finished piece is made from white gold, diamond and emeralds.
It went under the hammer, again to an unidentified telephone bidder, for 12.5 million francs, with the final price tag after taxes and commissions ticking in at 14.4 million francs ($14.5 million, €12.3 million).
Previously, Christie's set an auction record in May 2016 with the sale of a 14.62-carat diamond known as the 'Oppenheimer Blue' for $50.6m .