I was in Arizona on vacation and visited a town called Cave Creek, north of Phoenix. It was located next to a small mountain called Black Mountain. It was called Black Mountain cause most of it was made up of natural black slate or shale. It was beautiful rock, but I only took a small sample home with me. Now I want more, or at least something like it to decorate my tank...BUT I CAN'T FIND ANY!!! Does anyone know where I could get some dark slate or shale? :help: :look: