This amazing stone is a Orthoceras fossil that is about 400 million years old. It is from the Atlas Mountains in Northwestern Africa. It was cut by Gary Wilson of Arizona. Set in sterling silver and measuring 2.25 inches wide by 2 inches long including bail, it will fit on most necklaces. Pretty cut outs on the back along with a patina and satin finish, highlight this incredible stone. Complimentary polishing cloth included.