Round pin, lacy, delicate Edwardian style, probably silver. The frame for the cameo is stamped and the edges are milgrain. There are four pale grey rhinestones with two metal pieces pulled up to hold each stone in place. Cameo of finely-carved shell of a woman looking left, flowers in her hair and at neck. Prong held. Round hinge and older-style safety clasp. 1 1/16" diameter.