This is a glass vial that contains a genuine fulgurite. Fulgurites are the result of a lightning strike that hits the ground and melts the soil/sand into a hard glassy substance. Fulgurites are also called "petrified lightning". This fulgurite was recovered from the Saharan desert in Morocco.
Refer to the photo. The black centimeter cube is shown for scale and is not included. You get a glass vial and fulgurite like the one shown. Each fulgurite varies in appearance, but your's will be of similar size as the one in the photo. The glass vial measures approx. 2 inches tall (50mm) by 1 inch wide (25mm).