Diamond cuts

Latest render of diamond cuts. Left to right; top to bottom: Heart, Marquise, Cushion, Round, Princess, Oval, Radiant, Emerald, Cabochon, Heart shaped cabochon, Octagon(laying flat), Asscher, and Trillion

The shader on the left is the original built by The Digital M. The shader on the right was with some very basic tweeks to it.
The render above has quite a few differences, but also good lighting to highlight the facets of each diamond. 

An important aspect of doing a final render of something like a diamond with this type of shader is to use maximum number of light bounces via full global illumination.

Another important aspect of rendering small objects like diamonds is to make sure the scaling is roughly plausible. There's no such thing as a 500 carat diamond(to the best of my knowledge) so make sure you use about a 300 millimeter "lens" via your camera settings, as well as choosing a single diamond to focus on and using some radial, or f-stop depth of field.

I'll be doing a few more time lapse videos in the near future of some of the cuts since you guys/gals seem to really enjoy those. This gemstone series, though, will be coming to a close in the near future, and I'm glad to be at the point I am with the render quality to them. As always, thanks for checking in!