Pendants made using a Japanese technique called Mokume Gane (which means woodgrain metal) which is achieved through a process of layering different metals to create a sheet that can then be patterned by removing some of the top layers. These were made with copper and sterling silver and have between 16-32 layers of metal. The backs of the pendants are silver, so no need to worry about copper on your skin! // Due to the nature of this technique, every pendant is different and cannot be recreated. You will receive one of the pieces pictured. Pendants come with an 18 inch sterling silver chain.