Brain Sand

Brain Sand is known scientifically as corpora arenacea—crystal structures in the pineal gland, a small pine cone-shaped thing, kind of in the middle of our brains. Ancient wisdom sees it as a transmitter/receiver of all things psychic, i.e. the Third Eye. However one looks at it, the older you get the more Brain Sand you have so that it becomes visible on X-rays, sometimes used as anatomical landmark. Brain Sand is made up of phosphates and minerals of the trigonal system, having the shape of quartz.