A pair of citrine and diamond flower ear pendants, by René Boivin. Photo Christie's Image Ltd 2013

Each designed as a flower blossom, extending a circular-cut gradated yellow and orange citrine tassel, to the circular-cut diamond and citrine petals, mounted in 18k gold, with French assay marks and maker’s mark. Signed R. Boivin for René Boivin. Estimate: $15,000 – $20,000

Christie's MAGNIFICENT JEWELS. 10 December 2013. New York, Rockefeller Plaza -www.christies.com