The most beautiful sapphires of the highest quality have a superb sky-blue colour. The blue sapphire is particularly popular with the aristocracy and royalty (see the British crown jewels!), and is often gladly set in wedding jewels as an accent colour. Hence, Kate Middelton received sapphire earrings as a wedding gift from the King of Saudi Arabia. The world's most valuable sapphire is the Blue Belle of Asia with a selling price of 17 million dollars!