A 19th century pearl and gem-set brooch/pendant. Photo Bonhams The highly stylised foliate plaque, with a central cushion-shaped amethyst, within a ropetwist border and rose-cut diamond surround, suspending three natural pearl drops, surmounted by a similarly...

An early 20th century amethyst and diamond brooch The cushion-shaped amethyst drop within an articulated double border of single-cut diamonds and calibré-cut amethysts, suspended from an associated old brilliant and single-cut diamond tied ribbon bow...