As the name suggests, the function of the stone is to project an X-Ray vision of objects. Most commonly used for seeing what is behind doors and walls. It is described as a tiny red rock that Nine takes from his chest and gives to Sam in the Mogadorian Mountain Base so that he can check the cells for his father, Malcolm. At the Dulce Base, Nine uses the stone to check behind a large door, expecting there to be an army of Mogadorians lurking on the other side. Following stones such as the Healing Stone and the Xitharis, this item may also have the same attributes as a Legacy.