That is a very subjective question.
I can tell you that the most popular software for jewelry design is
Rhino is a very open platform, and as a result there are thousands
of plugins (Matrix is a Rhino plugin, 3Design is not). There are
other plugins some prefer, like RhinoRing or RhinoGold. Some prefer
them because of their functionality, while others are more agreeable
to their price.
Rhino offers a fully functional trial version, as do most of their
plugins do, like RhinoRing. Matrix and 3Design do not offer a trial
I encourage you to sign up at 3dcadjewelry.com to see what people
are using and the models they are able to produce. There is also a
lot of getting started materials.