https://www.sothebys.com/en/digital-catalogues/power-image-royal-aristocratic-tiaras/an-amethyst-sapphire-onyx-and-diamond-bandeau-cartier-1920s An amethyst, sapphire, onyx and diamond bandeau, Cartier, 1920s | Sotheby’s en Wed, 25 May 2022 13:16:44 GMT