A diamond and emerald 'ballet précieux' brooch, by Van Cleef & Arpels. Estimate $70,000 – $100,000. Photo Christie's Image Ltd 2015

Designed as a ballerina with a rose-cut diamond face trimmed with circular and marquise-cut diamonds and a pear-shaped emerald, to the circular-cut diamond top and tutu accented by marquise-cut emeralds, the gold hands and feet enhanced by pear and circular-cut emeralds, 3 ins., mounted in gold, in a Van Cleef & Arpels gray suede case - Signed V.C.A. for Van Cleef & Arpels, N.Y., no. 55843

Christie's. IMPORTANT JEWELS, 20 October 2015, New York, Rockefeller Plaza