An Art Deco sapphire and diamond double-clip brooch, by Bulgari. Photo Christie's Image Ltd 2012

Of opposing arch design, the pavé-set circular and baguette-cut diamond linear centre, flanked to either side by cabochon sapphire trefoil motifs within semi-circular pavé diamond fields, to outer graduated sapphire cabochon borders, accented with diamond point highlights, circa 1930, 6.3cm wide. With maker's mark *11RMA for Bulgari. Estimate £22,000 - £28,000. Price Realized £49,250 ($79,243)

Christie's. Important Jewels. 12 December 2012. London, King Street