A George III amethyst and topaz brooch, late 18th century, the oval-cut amethyst surrounded by seven
A George III amethyst and topaz brooch, late 18th century, the oval-cut amethyst surrounded by seven circular-cut topaz (and a white paste replacement), suspending three articulated amethyst and topaz pendants, mounted in foil-backed gold mounts, length 5.1cm