French Art Deco 9.63ct Unheated Oval Ceylon Sapphire & Old Cut Diamond RingPrivate page balance payment only. Do not use without prior agreement. A wonderful 9. 63ct cornflower blue Ceylon Sapphire, hand cut into an off round oval. Unheated Ceylon Sapphires are extremely rare. Set in a classic early Art Deco 1920s setting and highlighted by two Old European Cut diamonds. The shank is handmade in 18k Gold and is stamped with the French Eagle's Head hallmark on the outside. There is a maker's mark visible but it is too worn to