The ‘Beau Sancy’ Diamond Marie de Medici wore at her coronation in 1610 in France as Queen Consort of Henry IV sold at auction yesterday for a whopping £6.1 million at Sotheby’s auction in Geneva. With its extraordinary past of being worn in the crowns of different royalty the rose cut diamond is one of the world’s most famous and oldest historically significant gems.Five biders at the auction yesterday fuelled the price of this remarkable pear-shaped diamond weighing 34.98 carats. The diamond was estimated to sell for around £3 million as the desirable jewel has a romantic, royal history, passed among the royal families in France, England, Prussia and the Netherlands. The diamond has also been previously owned by film stars and billionaires, originally mined in India near Golconda. The Murat Tiara – a rare pear and diamond tiara also sold at the auction yesterday for £2.4 million. This historic tiara was originally created in 1920 for the marriage of Prince Alexander Murat, whose ancestors included Caroline Bonaparte – the younger sister of Napoleon I of France. The tiara boasts the largest natural pearls ever recorded at 303.37 grains.