If you own any .925 stamped sterling silver jewelry and you have noticed that some pieces are attracted to magnets, you may find yourself asking “Why is some sterling silver jewelry magnetic?” If you have come across this phenomenon, you may want to reconsider where you buy your sterling silver jewelry. A supplier may tell you that metal is one of the materials in the piece of jewelry to make it more sturdy or to give more support to chains, but this simply is not true.