An early twentieth century Art Nouveau brooch, formed as a flower with five petals, enameled in orangey-pink gradating to a pale yellow and centering a prong-set diamond, crafted in 14k gold, c clasp and pendant loop to the reverse, 1.25 in, 5.3 grams, circa 1900. 

Art Nouveau enamel jewelry emerged as a breathtaking fusion of artistry and craftsmanship during the late 19th and early 20th centuries, roughly spanning from the 1890s to the early 1910s. This movement was a rebellious response to the rigidity of academic art, embracing natural forms and flowing lines inspired by nature, mythology, and symbolism. Enamel, a glass-like material, became a central element in this jewelry, employed to infuse vibrant colors and intricate details into the pieces. Artists like René Lalique and Georges Fouquet championed this style, creating stunning jewelry characterized by sinuous curves, delicate filigree work, and the use of plique-à-jour, a technique allowing light to pass through translucent enamel. Flowers, dragonflies, nymphs, and other ethereal motifs were recurrent themes, showcasing the harmonious marriage of enamel's luminosity with the organic forms intrinsic to Art Nouveau. The movement's emphasis on beauty, craftsmanship, and a departure from conventional design conventions resulted in enchanting pieces that remain coveted for their timeless elegance and artistic expression.