I like all the shapes and colors try shooting with a fill flash next time and that will help to get rid of some of the really dark shadows. Also If you get a reshoot at this I would compose the photo without the rock in the bottom right corner and moce the circle shaped item up into the photo more so as to not run off the page.
Color form and texture... it is all there!!! The stone is a bit of a problem. Seems like it could be a strong element. I would like to see more of it or crop it out completely.