Two George IV hardstone brooches, 1830s, each designed as a butterfly

Two George IV hardstone brooches, 1830s, each designed as a butterfly, one set with moss agate, within beaded borders, wingspan 3.1cm, later pendant and brooch fittings; and one set with agate and jasper, within floral borders of gold cannetille, wingspan 4.4cm

Cf.: Hugh Tait ed. The Art of the Jeweller: A Catalogue of the Anne Hull Grundy Gift to the British Museum, London, 1984, p.24, nos. 749 and 750, for similar butterfly brooches