Several plug-ins are available for Rhino. For example, Rhino Gold
contains plug-ins that would include stone building. Jewel Tools,
another plug-in also has some capabilities. Of course, Matrix, which
"rides on" Rhino has many capabilities for creating stones and
modeling jewelry. It also comes with V-Ray rendering, which is a very
good rendering program that may also be purchased separately as a
Another excellent jewelry CAD program is 3Design. It comes with a
custom stone builder that will allow for both cabochon and faceted
stone modeling. Additionally, it has superb tools for creating
settings for pave’, channels, prongs, bezels, etc. 3Design also has a
rendering program that includes templates for backgrounds, lighting
effects and environments. Not only that but, your model, including
stones, is displayed in real time in the materials of your choice
while you model! It is a pleasure to work with.
I hope this helps!