Brennanite is an exceedingly rare and highly sought after igneous rock that many believe not to exist. Its identifiable features include an internal glow that suggests it may never have or never fully will cool. It is believed to be the finest grained igneous rock out their, which, in direct contrast to its
effervescent glow, suggests it must cool impossibly quick to achieve such a structure. The one known sample is believed to be kept
locked in the forbidden 3rd floor of the Fulton building at the
University of Dundee. Folklore has it that at least 3 students have attempted to sneak up there to find it, only to never return.