Art Nouveau Exceptional Ring, France, c. 1900. Gold, plique-à-jour, pearl & diamond. H 2.40 cm (0.94 in); W 1.50 cm (0.59 in) © Tadema Gallery.

An exceptional Art Nouveau ring in the manner of Georges Fouquet. 
The baroque-shaped natural pearl measuring approximately 11.3 x 7.6 mm. 

Literature: cf. Die Fouquet, 1860-1960, Schmuck Kunstler in Paris, Museum Bellerive, Zurich, 1984. 
Schmuck Kunst im Jugendstil,Art Nouveau Jewellery, 
Arnoldsche, 1999, p.33-50. 
The Paris Salons 1895-1914, Jewellery, volume 1, A-K, Alastair Duncan, 1994, p.247-260. 
Art Nouveau, The French Aesthetic, Victor Arwas, 1992, p.360 
Imperishable Beauty, Art Nouveau Jewelry, Yvonne J. Markowitz & Elyse Zorn Karlin, Museum of Fine Arts, Boston, 2008.