Very old time worn devotional metal. Double sided. It is silver over copper and has a thick patina. Look closely at the Mary and Jesus side and on the left there is an angel and on the right someone with a cross of Lorraine it looks like. It measures only 5/8" in diameter and weighs 1.9 grams. I love the old ones! If I was Catholic, I'd collect them and make a charm bracelet filled with them.