The Art of de Grisogono necklace sold for $33.5m

The flawless 163-carat clear diamond fetched $33.5 (£25.5) million at Christie’s auction in Geneva on Tuesday evening.

The large diamond was cut from a 404-carat rough stone found in the heart of Angola. It was the largest of its kind ever auctioned.

A team of 10 specialists in Manhattan cut the stone. The necklace, designed by Swiss jewellery maker de Grisogono, is made of 18 diamonds on one side and two rows of pear-shaped emeralds on the other. It took more than 1,700 hours to create.

The buyer’s identity has not been revealed.

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