I had a super color saturated piece of pyrope that was already bit thin and long, so I decided to see if I could cut it in shallow cut to compensate for the saturation. I had some success with this cut, but in the end it takes a LOT of light to get some good light return. This picture was taken outdoors in full sun, and you can see that there is very little light coming back through the stone, even though it was cut correctly for the refractive index and critical angle.
