GEORGES FOUQUET 1862–1957
Art Nouveau Ring 
French. Circa 1905
Gold, opal, enamel & pearl
Length: 1.8 cm Width: 1.8 cm (Length: 0.7 in)
Signed: G. Fouquet
Literature: cf. Les Fouquet,Bijoutiers & Joailliers a Paris
1860-1960,
Musee des Arts Decoratifs, 1983, page 92
The Belle Epoque of French Jewellery 1850-1910
Thomas Heneage & Co Ltd, 1990, page 307
Schmuck Kunst im Jugendstil, Art Nouveau Jewellery
Arnoldsche, 1999, page 33-50