 Imperial Russian diamond and aquamarine tiara by Koch, circa 1910, belonging to the Imperial family. |  18th century “Sévigné” shell brooch with emerald and diamonds on gold. |
 Historic oval cameo of Napoleon by Nicola Morelli (1771-1838), one of the most famous Roman gem engravers. |  A gold cupid pendant from the Renaissance adorned with rubies, diamonds and emeralds. |  A pink topaz and diamond tiara from a parure once owned by the German royal house of Württemberg |
