Vintage/Antique Victorian Revival Hera Cameo Pendant with Flower Accents

This is a beautiful vintage or antique Victorian revival cameo pendant depicting the Greek goddess Hera with two small flower accents on the setting. The front appears to be gold-filled, and there are areas where the color has worn away. There is a very small amount of green tarnish on the side of the setting, as well. The cameo does move slightly, but it does not seem to be at risk of falling out. Overall, the piece is in great shape. The cameo has fine lines through the white portion which lead me to believe that it could be resin/plastic, but I am not positive if it's that or shell. Approximate Dimensions: 1.5in x 1in