Vintage Art Nouveau Diamond Pearl Necklace in Yellow Gold.  This pearl and diamond pendant necklace is such a fabulous example of Art Nouveau style. The lower pendant evokes a strong love of nature with its green enamel leaves and their yellow gold lines webbed beautifully underneath. The upper pendant features pearls more prominently in an equally lovely natural scene with another leaf element of painted enamel. This is a piece full of elegant and graceful lines that highlight the beauty of nature as was common in the Art Nouveau period.