v-ray gems

A while ago I tried to render a diamond. This one is done using V-ray for maya. Mental ray does not provide dispersion which can be observed in diamonds. I found out that you can achieve this in post by assembling a few renders with different IOR and colors. This is my first try with vray. I've added zdepth, chromatic aberration and bloom in post. Caustics don't look that natural but because my computer was struggling with this dispersion a lot a don't want to burn it in second try:D.

@Edit:

I'm adding a screenshot of my shader setup f any one is interested.