This undated image made available by the Royal Collection shows the South Africa Necklace and Bracelet, part of a exhibition of royal gems being staged to mark the Queen's 60-year reign at the Queen's gallery, Buckingham Palace.
Emeralds of Empress Ekaterina II of Russia. C. 1830. Gold, silver, emeralds, diamonds. Set consisting of an emerald and diamond necklace with matching earrings. Every generation of the family of the Marquis of Lothian has believed that the majority of these emeralds were given by the Empress Ekaterina II to their ancestor, the Earl of Buckinghamshire during his embassy to St. Petersburg 1762-1765.
c.1907. The Cartier diamond and platinum laurel leaf tiara that belonged to Princess Marie Bonaparte, who became Princess George of Greece. This tiara can be worn with or without the centre diamond drop.
René Lalique Diamond ring. The large diamond is set vertically along the bezel, framed within a border of green leaves on black stalks, with the shoulders also enamelled dark green. By René Lalique c.1902-4.