Jewellery was one of the purest, and most successful, expressions of Art Nouveau style, using sensuous organic forms to create a vast range of objects of exceptional beauty and inventiveness. 
In 1893, greatly influenced by the ideas of William Morris, a young Belgian Architect Victor Horta, began to plan the first important house to be built in Art Nouveau Style: La Maison Tassel.
Two year later in 1895, in Paris, the pioneer city of so many world affecting art forms, the name of the Movement , Art Nouveau, was finally settled in the French language. In particular because of the art gallery "La Maison de l'Art Nouveau", which was opened as a showroom for the new art by a Japanese art collector, Siegfried Bing.
All the Art Nouveau artists were largely reacting against the Classic aesthetic, a style described as often "fussy and inhibited." They found a freeing vocabulary in natural and organic forms. The movement's signature motif was the S-curve, which might be found in a flower's stem on a brooch or the trail of smoke from a cigarette depicted in a theater poster.
The Art Nouveau artists were not shy about the naked body, contrary to their predecessors, and the Art Nouveau style is often described as a feminine one. But some Art Nouveau was also geometric as the forms designed by the WIENER WERKSTÄTTE and Josef HOFFMANN.
As with architecture, the Art Nouveau Jewelers exeprimented with new forms, new materials and new techniques as the final objective was the originality and beauty of the jewel, not only the intrinsic value of the materials used.
The Art Nouveau style affected all the Jewellery pieces: rings, brooches, necklaces, pendants, bracelets were made in Art Nouveau style but also cufflinks, hatpins, hair combs, belt buckles, tiaras, diadems, and theatrical head or corsage ornaments. The leading Art Nouveau jewellers, Louis Comfort TIFFANY, Karl Fabergé, René Lalique, Philippe WOLFERS and Georges Fouquet, among others, created extraordinarily beautiful and original jewels inspired by natural and mythological themes: enchanted women, mythical beasts, superb insects and exotic flowers were all common motifs.
Also the most common production followed the Great Art Nouveau Masters and would change the Jewellery world.
Art Nouveau jewellery follows curving sinuous organic lines of romantic and imaginary dreaminess, with long limbed ethereal beauties sometimes turning into winged bird and flower forms. The movement began in Paris and its influence went throughout the Western world.
The Frenchman René Lalique was the master goldsmith of the era of Art Nouveau producing exquisite one off pieces. As an art movement today, the style is still admired and still copied.
Magnificent floral and botanical forms often worked in enamel were inexpensive and became so popular once mass-produced, that the Art Nouveau style declined.