Rainbow Iris Agate is a RARE Variety of agate. face-up, it looks like any other ordinary agate. Under Transmitted light, you will see splendid rainbow fire~ There is Stunning Rainbow fire shown when light strikes from the back at certain angles in this piece! It is a AAA Grade piece~ Look at the amazing rainbow effect~ It is very hard to show on photos. Be Prepared to be mesmerized by the rainbow color gazing it against the room light or sunlight~ You will not be disappointed~