This is an early 20th century--probably 1930s--French necklace of both poured (like Rousselet beads) and Gripoix beads (glass fired into brass). The glass perfectly mimics jade, carnelian, and amethyst. One of the faux carnelian beads has a flake. It is very unusual--I haven't seen another in many a year--and it really is a fooler for semiprecious stones. It is opera length 30 inches; the beads range from 5/8 to 1 inch.