All of the images are natural out of my iPhone 7S camera with no post processing, just cropping.

For some reason, (maybe because I was too close to the stones or maybe because the camera corrected for the background clouds?) the camera did not capture the brightness of the stones as well as it did in that storm cloud image.

I was also shooting many of these from the opposite direction of the storm clouds...

Maybe it was also the distance I was shooting from that made a difference in how the camera interpreted the brightness of the stones.

The stones are very bright, but many of these images made them look a little faded.

Anyway, I really like that storm cloud image!