Having the bright stone on the thirds line is a good choice for composition. I like the diagonal line of the stones. It needs more interest somehow - would be nice if the leaves at the top came more into the frame. It feels very rough, grainy, which works with the subject. But at the same time the scattered stones and the scattered texture make it feel to loose for me. Perhaps getting in a bit closer to the white stone, and using a smaller depth of focus so the one stone is sharp while the other blur into the distance. This would anchor the composition more.