Eugène Séguy (1890 – 1985) was a French entomologist who published many portfolios of illustrations and designs from the turn of the century to the 1930s who worked in both the Art Deco and Art Nouveau styles.
Circa 1890s, 14k, American. This extraordinary antique diamond and enamel butterfly brooch is a superlative example of American Art Nouveau jewelry. Glowing enamel and bright white diamonds adorn the textured gold wings of this naturalistic pin. | 1stdibs