These brand new franco chains are 100% guaranteed 14k yellow gold and have been professionally tested and stamped 14k. These chains are real solid gold they are not overlayed not plated not filled. The chains fasten with a 14k yellow gold lobster clasp. Franco chains are especially known for their classic style shine and strength. These high quality chains will not tarnish discolor or fade as they are pure 14k gold and made in italy.