A ruby and diamond ring from Cartier sold for $US7.3 million ($AU10.6 million), and featured an 8.3-carat Burmese ruby surrounded by white diamonds. Source: Poly Auctions

This 38-carat pear-shaped diamond is D-colour and VVS1-clarity. and was set in a pendant necklace by Jacques Timey for Harry Winston. The necklace is platinum and white 18-carat gold and features an additional 20 carats of G-colour diamonds. Source: M.S. Rau