Vintage cameo locket

Vintage cameo locket necklace . Cameo opens for 2 picture spots . It’s large 2” x 1 3/4 and has a bale for the necklace . Chain is old and detailed links with closure it’s 24” long . This looks like is could be gold . I’m not selling is stating that it is . I can’t find any markings on it . I’m selling for price as a cameo , the size , condition and detail . I will take this to my jeweler next time I go in, and if it is gold it’s obviously going to be way more . The piece is gorgeous