A diamond and cultured pearl pendant brooch, by Van Cleef & Arpels. Photo Christie's Image Ltd 2014

Designed as a circular-cut diamond plaque, trimmed with marquise-cut diamonds, centering upon a cultured pearl, measuring approximately 13.45 mm, mounted in platinum, with pendant hoop for suspension. Signed V.C.A. for Van Cleef & Arpels, N.Y., no. 41073. Estimate: $30,000 – $50,000

Christie's. MAGNIFICENT JEWELS, 16 April 2014, New York, Rockefeller Plaza -www.christies.com