Brooches Jewels : Edwardian Enamel and Diamond Brooch, the guilloche enamel navette with rose-cut … 3 October 2018 3083 Brooches Jewels : Edwardian Enamel and Diamond Brooch, the guilloche enamel navette with rose-cut diamond accents, silver-topped 18kt gold mount, lg. 1 1/8 in.