A 14.31 carats Colombian emerald and diamond ring. Estimate US$180,000 - 220,000 (€170,000 - 200,000). Photo: Bonhams.

centering a cut cornered rectangular step-cut emerald, weighing 14.31 carats, with baguette-cut diamond shoulders;mounted in platinum; size 6

Accompanied by C. Dunaigre, Switzerland, report #CDC 1201222, dated January 26, 2012, stating the emerald as: emerald, natural beryl, Colombian origin, with indications of minor clarity enhancement.

Accompanied by AGL report #CS 84316, dated March 11, 2015 stating the emerald as: Colombian origin, with minor clarity enhancement. 

Bonhams. FINE JEWELLERY, 15 Apr 2015 14:00 EDT - NEW YORK