The star attraction at Christie's Important Jewels sale in London yesterday was the 14.66ct untreated sapphire known as The Royal Blue, which fetched £1,398,500 (estimate: £400,000-£500,000).

The star attraction at Christie's Important Jewels sale in London yesterday was the 14.66ct untreated sapphire known as The Royal Blue, which fetched £1,398,500 (estimate: £400,000-£500,000).