Watch your light sources and your focus. The stones would be a lot more effective with ultra sharp focus and DOF, and you would have had better lighting if you had used a softer source. Maybe bouncing the flash off the ceiling, or shielding the stones with a thin layer of white cloth or translucent plastic. It would have eliminated the hot spots that are a bit distracting, and if the light wern't too soft you still would have had the definition. I like the design very much, and there is a lot that is interesting in your photo. Paul.
The colors in this photograph are lovely. Unfortunately, I feel my eyes all over the place, there does not seem to be a subject that draws my attention.