A diamond and gold necklace, by Cartier. Photo Christie's Image Ltd 2014

Designed as three rows of circular-cut and bezel-set circular-cut diamonds, intersected by circular-cut diamond plaques, mounted in 18k gold, 14½ ins., with French assay mark and maker's mark, in a Cartier red leather box. Signed Cartier, no. 651682. Estimate: $25,000 – $45,000

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