The epitome of order. Although rarely found within the universes, pure crystals are fairly common in the interuniversal space, where they are commonly used to focus energies between universes. They are often made of Realium (though there are exceptions) focused into crystal lattices by naturally occurring brizomagnetic fields projected from brizospace. As such, they share the properties of Realium but are also conducive of interuniversal energy due to their crystal structure. Notable in-universe pure crystals are special Plotdevicium crystals used to power doomsday devices and the Dep'thi'chyan Crystalyon.
Its importance in the GSOT is #16.