From the Bike Trail of the Iowa Great Lakes! This one is one of my favorites. Made from lava stone that was part of the underlayment of the old railroad in Dickinson County. We don’t know the original location of the volcanoes, but we do know that as lava runs down, it picks up a rock and this is the result….a beautiful blue stone center. measures about 2″ in diameter and includes an 20″ silver ball chain. Great with denim!