Vintage Cameo Necklace Black

Vintage Cameo necklace. Silver toned with black accents. The necklace is vintage, but it's not antique. It was probably made within the past 40 years. There's some tarnish on the chain & some scratches on the back side of the pendant. I'm not sure if the bust is made of resin or glass. The pendant is roughly 1.5". The chain is roughly 20-22"