Oval Diamond vs Oval Moissanite Ring Comparison Click to Watch Comparing an oval moissanite ring (shown closest to the fingertip in the first part of the video) to an oval DIAMOND ring. The difference between these stones is subtle with the only distinguishing factor being the Moissanite having a bit more fire: flashes of rainbow-like colors emitted from the stone.To see more videos go to our Video Gallery Page here