4 - Portrait-charge du peintre Jombert, les bras ballants, 1773-1774, Paris musée du Louvre, (c)RMN - Grand Palais (musée du Louvre)

A set of diamond and multi-gem jewelry. Photo Christie's Image Ltd 2014

Comprising a fringe necklace, suspending variously-shaped cabochon emeralds, rubies, sapphires and seed pearls, to the rose-cut diamond neckchain; and a pair of ear pendants en suite, each set with a cabochon pear-shaped ruby, weighing approximately 3.85 and 3.67 carats, mounted in 18k gold, 15¾ ins. Estimate $40,000 – $60,000

With report CS 42175 A and B dated 5 May 2010 from the American Gemological Laboratories stating that it is the opinion of the Laboratory that the rubies, weighing approximately 3.85 and 3.67 carats, would be classified as Burma (Myanmar). No gemological evidence of heat (2)

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