A Pensieve is a stone basin used to store and review memories. Covered in mystic runes, it contains memories whose physical form is neither gas nor liquid. A witch or wizard can extract their own or another's memories, store them in the Pensieve, and review them later. It also relieves the mind when it becomes cluttered with information. Anyone can examine the memories in the Pensieve, which also allows viewers to fully immerse themselves in the memories stored within, much like a magical form of virtual reality.