A color-change sapphire and diamond ring, By Harry Winston

Set with a cushion-cut color-change sapphire, weighing approximately 25.70 carats, flanked on either side by a tapered baguette-cut diamond, mounted in platinum. Signed Winston for Harry Winston. Estimate $25,000 - $35,000  - Price Realized $80,500

A pair of color-change sapphire and diamond ear clips

Each set with an oval-cut color-change sapphire, weighing approximately 14.95 and 16.65 carats, within a pear and circular-cut diamond surround, mounted in white gold . Estimate $20,000 - $30,000  - Price Realized $50,000

Christie's. New York Jewels. 11 June 2009. New York, Rockefeller Plaza www.christies.com