An opal and diamond ring. Photo courtesy Bonhams.

centering an oval-shaped opal, weighing 26.78 carats, within a round brilliant-cut diamond surround and engraved mount; estimated total diamond weight: 1.75 carats; mounted in fourteen karat white gold; size 7 1/4. Estimate US$ 7,000 - 9,000 (€5,100 - 6,500). Unsold.

Bonhams. Fine Jewellery New York. 19 Jun 2013 - www.bonhams.com