The only system you can buy complete, that I know of is the Cloud
Oh wait, there is another one, that's more expensive, in the Rio
Building your own system is quite easy, however.
The Charles Lewton Brain book and video set describe the set up in
great detail and it's easy to set up.
I used to work in a shop where we had a white plywood box on a side
counter top, with the camera connected to it with a bracket thing.
The camera had a ring flash on it. The box had a piece of non glare
glass at an angle in inside it. The blue background paper went
under the glass.
We used prop wax (from the camera store) to hold jewelry in place
This was very easy to use -- camera settings were always the same,
just set up the jewelry, frame the shot and click.
This set up is not good enough for jury slides, but it's good enough
for documentation and maybe catalogs.
Chicago area, Illinois, USA
Metalsmith, Certified PMC Instructor
Studio 925; established 1992