I am a pro jewelry photographer and use a variety of lighting, cameras, lenses, props and little tricks to get the results I'm after. IMHO, photographing jewelry with the quality needed to go to press and for web catalogs is a long road ahead, but a fullfilling challenge when you get the results you are visualizing.
Looks like you are on your way, so just keep shooting, experimenting and having fun with it. Sometimes, you want to tear your hair out in frustration, haha
Steveb