An emerald and diamond ring. Photo Bonhams.

set with a cut cornered rectangular step- cut emerald, measuring approximately 16.84 x 9.10 x 8.16mm., within a two tiered circular-cut diamond surround; estimated total diamond weight: 2.75 carats; mounted in platinum; size 8 1/4. Estimate US$ 25,000 - 35,000 (€18,000 - 26,000)

Accompanied by AGTA Identification Report #96050211, dated July 17, 2008, stating: Species: Natural Beryl; Variety: Emerald; Origin: Columbia; Moderate Clarity Enhancement.

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