This lecture explores Art Deco jewellery during the 1920s and 30s. These were decades when jewellery was still widely worn in society and diamonds predominated. The title quotation - and indeed the term Art Deco - comes from the 1925 Paris Exposition internationale des arts décoratifs, at which a breathtaking selection of jewellery was shown. The lecture covers work by the finest makers of the period, especially those from Paris (Cartier, Boucheron, Fouquet, Van Cleef & Arpels and Chanel) alongside other major houses like Tiffany in New York. It was a time when jewellery responded very directly to women’s lives being less constrained, something illustrated in the lecture with lots of entertaining contemporary references and a colourful cast of characters - from Hollywood to aristocrats and royalty.