I have a long sterling silver snake chain with a ball that it slides through. The chain is marked 925 Italy. It is 24 inches long. The ball charm on it is also marked 925 Italy. The front half of the ball is covered with small clear stones. The ball pulls to a magnet so I took it to a refining company to see if it wasn’t really silver. They said it is sterling but probably has something else in it to strengthen it where the chain goes through. See my other ads for jewelry, artwork, home decor and more.