Magnificence . An unmounted heart-shaped D colour, Internally Flawless, Type IIa diamond weighing 56.15 carats, with excellent polish and symmetry. Estimate: SFr.9,000,000-12,000,000 / US$9,000,000-12,000,000 / €6,600,000-8,800,000 / £5,600,000-7,500,000....

A magnificent emerald and diamond necklace, by Jahan. Photo: Christie's Images Ltd., 2010 The necklace designed as a double line of brilliant-cut diamonds with pear-shaped diamond accents, suspending a fringe of seven pear-shaped emerald drops, each mounted...