Rare Vintage Brooch

Vintage and unique oval victorian/art deco brooch with raised cameo wearing a necklace with center rhinestone. Not sure of what it’s made of but appears to be some type of resin on silver tone metal with metal backside. Intricate detailing. Pin has some bend but works perfect. Silver and black enamel? Shows signs of wear along sides and marks on back. Measures 2 inches in height and 1 1/2 inches at widest point. No Markings. Was stored. Rare piece of history