I'm not sure what the green stones are that make up this bracelet. Could be nephrite, jadeite or something else. All I can say is that they are cold to the touch. The chain is made of some type of silver metal but is not sterling. The spring ring works well and is secure. The length of the bracelet is 7" and the width is 7/8". It has the look of an Egyptian or Greek piece of jewelry from the 1920's or 30's.