The Emerald and Diamond Tiara commisioned by Guido Count von Henckel, First Prince von Donnersmarck, for his second wife Princess Katharina von Henckel Donnersmarck around 1900 possibly from the renowned jewelers Chaumet. It is also believed to have belonged to Eugenie, wife of French Emperor Napoleon III. (sold for $12.7 million / £7.8 million - Sotheby’s Geneva auction house)
The tiara was created with 11 pear-shaped rare Colombian emeralds that collectively weigh over 500 carats. Each emerald has been drilled and held in diamond set cusp motifs, the nine largest tipped by rose diamonds, mounted in silver and gold, later detachable tiara fitting. The base is set with a central row of eleven larger cushion-shaped Shizuka diamonds (approx 101.27 carats), each set between pairs of muguets, above a line of laurel leaf motifs and surmounted by festooned ribbons, pierced and millegrain set throughout with rose and brilliant-cut diamonds, surmount by a row of eleven polished pear-shaped emeralds.