A gold and enamel miniature frame by Carl Fabergé, circa 1900

Diamond and aquamarine brooch by Carl Fabergé; a gift from Tsar Nicholas II to Princess Alix of Hesse on the occasion of their engagement

Platinum and diamond bracelet by Paul Flato, circa 1940

Platinum and diamond fringe necklace, circa 1900

Art deco diamond and aquamarine necklace by Olga Tritt, circa 1939

Geoffrey Munn examines jewellery on the BBC’s Antiques Roadshow

Art nouveau gold and pearl pendant by René Lalique, circa 1902