A "Mystery Set" ruby and diamond brooch, by Van Cleef & Arpels. Photo Christie's Image Ltd 2013

Designed as a calibré-cut ruby flower with brilliant, tapered baguette and baguette-cut diamond trim, joined to the baguette and whistle-cut diamond stem and marquise-cut diamond leaves, mounted in platinum, 1958, 4.7 cm long, in blue suede Van Cleef & Arpels case. Signed Van Cleef & Arpels, no. NY30215 . Accompanied by a certificate of authenticity from Van Cleef & Arpels. Price Realized $72,808

Christie's. HONG KONG MAGNIFICENT JEWELS.28 May 2013. Convention Hall - http://www.christies.com