Good composition. Macro/closeup is good. I have tried rocks and they are really hard! You did a good job. I think the saturation could have been pushed up some more - there is no pop in the image. But very good, none the less.
Lovely colours in the various stones. Good lighting, can't do anything with the bouncing of light with stones. How come you show a red border on the bottom, but not anywhere else? In a contest, you'd get tossed. Here, you only get a 6 instead of a 7. Sorry.