This is an unusual vintage necklace. It features graduated ivory colored overlapping disks. They range in diameter from approximately 1/2" to 7/8". The disks have a swirled design and they are stung on a fine goldtone chain. They are made of an early plastic material, possibly celluloid, also known as French Ivory.
The necklace closes with a barrel screw clasp. It measures approximately 19-1/2" in length and is in excellent condition.