This is a pretty unique piece. More than likely, it is a one of a kind piece. It is a 14k Yellow Gold Pendant. It resembles a Martian or Gladiator. It is not marked 14k, but it has been tested (see photos). The pendant measures about 1 1/4" top to bottom (including the bale). The bale measures 1/4" H x 5/32" W So, it can definitely accommodate a large variety of chains. This is an estate find. I''ve never seen another like it, and it may very well be a custom made (one off) piece. It is in excellent previously owned condition. Some minimal signs of wear, typical of having been previously owned / worn. It weighs about 3.47 grams.