A suite of diamond and gold jewelry, by René Boivin

Comprising a necklace, designed as a series of bombé pavé-set diamond discs, which pivot to reveal a polished gold disc, each set within "U" shaped sculpted polished 18k gold links, and a pair of ear clips en suite, mounted in 18k gold, 16 ins., with French assay marks and maker's marks. Each signed René Boivin (2). Est. $40,000 - $60,000

Christie's. Jewels: The New York Sale. 22 April 2009. New York, Rockefeller Plaza www.christies.com