I thought the original render was decent enough, considering I had no plan or direction when making this scene beyond, “Show off the pretty rock model.”
However, a day or two after rendering, I tried my hand at some minor editing with my phone. Upped the exposure and the contrast, tweaked the saturation a pinch…basically a handful of subtle, minor adjustments. And now, as with the Cat Statue scene, I can’t tell if the adjustments I made actually improved the image or not. 
Let me know which one you think is better-- the original:
Or the tweaked version:
