rnl said:
yes please...I used a ring flash and a 600rt as a slave.
can't seem to get good detail.
I've never done this kind of photography, but I'll see if I can offer a few useful ideas. First, I agree with Mikehit that the stacking software is struggling. Every different focus distance produces different reflections off the facets. Experiment using extremely soft light instead of the direct ring flash.
Also, it appears that the large number of photos is accumulating many of the facet reflections to give the image a muddy or grainy look, almost as though the stones have multiple internal flaws. Try using fewer photos in your stack to see which negative effects diminish -- that may give you more clues.
Last, search for "jewelry photography stacked focus" and see how others are doing it successfully.