This is a Trifari designer signed single strand necklace. There are rough textured goldtone beads with AB aurora borealis coated beads for spacers.
There is a hook marked Trifari with a large T without a copyright symbol. The chain closure appears to be missing a bead at the very end. Since that is for decoration it still closes securely. Circa early 1950s.
The necklace is 28 inches and there is a nice heft to this vintage find.