This page contains references to diamonds or engagement rings from different companies. Sometimes I do receive a commission when you click on links and buy the products. It was a much talked about diamond which went to auction at Sotheby’s Geneva on 11 November and the result was just as exciting as the pre-sale tension. The 12.03 carat ‘Blue Moon’ diamond was bought by a Japanese billionaire for an incredible $48.4 million; a new world record for the price paid for a gemstone.