A pair of sapphire and citrine flower brooches, by Taffin. Photo Christie's Image Ltd 2013

Comprising two flower brooches, each centering upon a cushion-cut sapphire, to the pear-shaped cabochon citrine petals, mounted in platinum. Each signed Taffin, nos. 317 and 318. Estimate: $30,000 – $50,000

With report CS 57542 A and B dated 24 October 2013 stating that it is the opinion of the Laboratory that the origin of this material would be classified as Ceylon (Sri Lanka). No gemological evidence of heat 

Christie's MAGNIFICENT JEWELS. 10 December 2013. New York, Rockefeller Plaza - www.christies.com