The star at Christie's sale of Magnificent Jewels in Geneva on 14 May 2014 was the 13.22ct 'The Blue' diamond. It sold for close to $23.8 million, which is nearly $1,800 per carat - a new world record price per carat for a blue diamond.

The star at Christie's sale of Magnificent Jewels in Geneva on 14 May 2014 was the 13.22ct 'The Blue' diamond. It sold for close to $23.8 million, which is nearly $1,800 per carat - a new world record price per carat for a blue diamond.