something about this says to me, "not completely natural" but i don't know maybe it is....the color contrast just looks nearly impossible for sandstone. maybe it's something that you did with the color to try to enhance your image.
perfect. great eye to find the 0. very naturally occuring. the focus and clarity are great. i love the texture in the sandstone. the angle and framing/cropping you have chosen here is good. normally, centering an object doesn't work for me, however, I think it works very nicely in this case. good luck in the challenge.
Great textures and colors! One of my highest rated this competition. The only thing lacking for me is the composition. The number is there right in front of you and it doesn't leave anywhere for the eye to wander - my eye wants to follow the grain of the sandstone to the upper left but is disappointed when the picture ends. This is personal preference though, so congrats on a great shot!