CHARLES BOUTET DE MONVEL 1855-1913
Art Nouveau Ring 'Bat Maiden'
Gold, opal & diamond
Length: 3 cm  (Length: 1.1 in)
The shank with indistinct maker's mark & French eagle
Circa 1900
Fitted case, the silk marked:

'I. Lautier, Joaillier - Orfevre, Toulouse'
Literature: cf. Kunsthandwerk um 1900, Jugendstil, Art Nouveau Modern Style, Nieuwe Kunst, catalogue of the Hessischen Landesmuseum, Darmstadt, 1965, catalogue number 143, p. 127
The Paris Salons1895-1914, Jewellery, The Designers A-K
Alastair Duncan 1994, p. 94-107
The Belle Epoque of French Jewellery, 1850-1910
Thomas Heneage, 1990, p. 238-241
Art Nouveau, The French Aesthetic

Victor Arwas, 2002, p. 371, 372 & 607