This picture doesn't have a center focus, you have three different rocks, all with different textures. I think you should of chose only one particular rock, and emphasize the texture, color, and shape of that particular rock.
I can see what caught your attention here Catherine with three unusual and contrasting textures, that would have caught my eye as well. I would have given this a bit more contrast and a wider view but that probably would have included more rocks in the area that were less striking in nature. Maybe a blur around the perimeter would have enhanced and focused the view on just the three rocks. Cool rocks I must say:) Hope you find this helpful. BB