An emerald and diamond ring. Photo Philips de Pury & Co

The octagonal step-cut emerald, weighing 8.78 carats, claw-set within a scalloped openwork pavé-set diamond bezel, set with pear-shaped rose-cut diamond accents to trifurcated pavé-set diamond shoulders, ring size I. ESTIMATE £95,000-125,000 - Unsold.

PROVENANCE Accompanied by report number 0701011, dated 9 January 2007, from the Gubelin Gemlab, Lucerne, stating the natural emerald to be of Colombian origin with indications of minor clarity enhancement.

Philips de Pury & Co. Jewels. 1 june 2011. London