I bought this favia frag at a LFS. It was nothing to look at, but I felt sorry for it. It was in the bargain bin for $10 and there was 30% off that. I thought nothing of it and placed it on a frag rack.
In the first picture is the favia in the lower left corner. The color of mud. In second this the same basic angle. You can see how much it has colored up. It has been a couple weeks between the 2 pictures and I hope it colors up even more.