18k diamond necklace with plique a jour enamel

18k yellow gold pendant with diamonds and plique a jour enamel.  Plique a jour is an enameling technique very similar to stain glassed windows.  The enamel is transparent and set in 18k yellow gold cells.  This was a popular technique in Art Nouveau jewelry.  The pendant measures 1" long, the chain is 14k yellow gold and measures 16" long.  Extra pretty!