An opal and diamond brooch, Ruser. Photo: Bonhams

designed as a circular-cut diamond bird, with a pear-shaped opal body, sitting on a baguette-cut diamond perch, enhanced by an onyx cabochon eye; signed Ruser, with signed box; estimated total diamond weight: 3.85 carats; mounted in eighteen karat gold plated platinum; length: 2in. Estimate US$ 2,500 - 3,500 (€1,800 - 2,600)

Property from the Estate of Onnalee Olson Doheny

Bonhams. FINE JEWELLERY. New York. 17 Jun 2014 - http://www.bonhams.com/