An Art Nouveau pearl and diamond necklace, early 20th century, composed of asymmetrical foliate

An Art Nouveau pearl and diamond necklace, early 20th century, composed of asymmetrical foliate scrolls, set with circular-cut diamonds and two pearls, suspending a detachable pendant, mounted in silver and gold, to a later gold chain necklace 40cm, length of pendant 6.6cm, pearls untested, detachable brooch fitting, fitted case stamped Collingwood & Co.