An Art Nouveau pink tourmaline and seed pearl pendent necklace, circa 1900, of foliate design, the knife-edge openwork plaque set throughout with half seed pearls, accented by a circular and oval-cut pink tourmaline, suspending an articulated pendant with pear-shaped pink tourmaline terminal, on a fine-link gold neckchain, pearls untested for natural origin,one half pearl deficient, mounted in gold, length 43 cm