The Art nouveau artist Georges Fouquet’s enamel and pearl jewel (1908) and Mary Katrantzou dress (Art nouveau inspired print).
“The word enamel comes from the Old High German word smelzan, which means to smelt. In jewelry, enamel is a decorate coating applied to metal. It begins as a powder with a texture similar to that of baby powder. It’s fused to metals using high temperatures.”
Art nouveau jewelers like René Lalique, Eugène Feuillâtre, Masriera brothers and Georges Fouquet realized marvelous enamel pieces.
The renowned Art Nouveau jeweler Georges Fouquet (1862-1957) created exquisite enamel jewels representing landscapes and portraits designed by Alphonse Mucha.
Eugene Feuillâtre (1870-1916) also designed enamel jewels.
René Jules Lalique (1860-1945) was renowned for his enamel jewelry :
The Masriera brothers also used enamel to decorate theirs designs.
Sources : Bmjnyc.com , Oxford dictionary and Pinterest