Alpaca Silver refers to a type of metal alloy often used to replace silver. It consists of 55 percent copper, 20 percent nickel, 20 percent zinc and 5 percent tin. It is also referred to as nickel or nickel-copper plating. Because it resembles silver and is less expensive, it is a popular material used in jewelry production. Easy to care for, it does not tarnish as deeply as sterling silver and is easier to clean. Alpaca silver jewelry is both durable and beautiful, making it a high quality product.