Fulgurites are an incredibly interesting piece of nature. They are a form of glass, formed naturally when lightning strikes sand or dirt. The heat caused by a lightning strike is immense and can fuse the sand together into a tube like formation known as a Fulgurite.
They are rare, of course – lightning generally strikes in the highest place and that is generally not where sand is. They are easiest to find in deserts, where unusual changes in the sand and soil can be spotted from quite far away. Most of the fulgurites I supply are found by the Berber peoples of Algeria and the surrounding area.