A superb natural fancy intense yellow diamond ring, by Michael Youssoufian.

A superb natural fancy intense yellow diamond ring, by Michael Youssoufian. Photo Philips de Pury & Co

Designed as a flower, the natural fancy intense yellow cushion-cut diamond, weighing 22 carats, set to the centre of pavé-set fancy yellow and yellow diamond petals, ring size L, remaining diamond weight 6.92 carats. ESTIMATE £360,000-560,000 - Unsold

PROVENANCE Accompanied by report number 1132021353, dated 26 January 2011, from the Gemological Institute of America, Carlsbad, stating the diamond to be natural fancy intense yellow, VS2 clarity.

Philips de Pury & Co. Jewels. 1 june 2011. London www.phillipsdepury.com