An Art Nouveau Yellow Gold, Peridot, Demantoid Garnet and Plique-a-Jour Enamel Stick Pin, Louis Comfort Tiffany for Tiffany & Co., containing a central oval cabochon cut peridot measuring approximately 10.55 x 8.31 x 6.40 mm in a bezel setting within the wirework surround accented with translucent pale blue enamel and five round mixed cut demantoid garnets above the pin base, double gallery with piercework.Stamp: TIFFANY & CO. 3.70 dwts.