Fabulous prismatic rainbows of fabulousness. Not just RGB, THE WHOLE RAINBOW.
Sorry for the poor render, will render it overnight to see if the mess that is the interior converges properly.
Update: Organized the nodes, fixed some stuff.
Update 2: Changed the object to a triangular prism because duh.
Update 3: I don't like the lack of vibrance to the dispersion, upping the delta amount and seeing if that helps. New image.