An Opal, Diamond and Ruby Butterfly Brooch;. photo: Christie's Images Ltd 2012

The body set with an oval and a pear-shaped opal with round ruby eyes and cabochon opal antennae, with cabochon opal and circular-cut diamond wings, mounted en tremblant in 18k yellow gold. Lot 53. Estimate $2,000 - $4,000

Christie's. The Van Cliburn Collection. 17 May 2012. New York, Rockefeller Plaza