An emerald and diamond ring. Photo Bonhams.

set with a cut-cornered square step-cut emerald, weighing 7.88 carats, with trillion-cut diamond shoulders; mounted in platinum and eighteen karat gold; size 6 1/4. Estimate US$ 30,000 - 40,000 (€22,000 - 30,000)

Accompanied by AGL report #CS 57197, dated October 17, 2013, stating the emerald as: natural emerald, Zambia origin, with minor modern clarity enhancement.

Bonhams. FINE JEWELLERY, New York, 17 Jun 2014 11:00 - http://www.bonhams.com/