Jewelry retouching

I think the rest is up to you prettyjoe, the ring looks a bit flat and needs more tonality(shades of black to white) but these are creative decisions that you have to make for yourself in many ways.

I have shown you an image I made, given more instruction by annotating it. Maybe you can do some research on other jewellery shots on websites and shops and see how they compare to your shots.

The beauty of retouching is understanding what you are trying to achieve at the beginning and gearing the whole process to that result with the tools at your disposal.

if you are interested in creating amazing effects in photoshop i would recommend pixel playground in lynda.com:

Pixel Playground

Bert Monroy is amazing at showing you how to accomplish amazing effects in photoshop. Its great for learning how light behaves and how to use the tools in photoshop to create those effects

I started with much the same as you. Once cutout, I applied many gradients to the facets of the ring, particularly in the shank by making paths. Dodge and burn helped to shape it. De saturate the ring too, black and white removes the strange colour casts you get from flare etc but don't go mad, let some colour come back through as a natural grade. Don't be afraid to let the whites go to zero-dot white because  silver will have natural specular highlights.

Added custom brushes at the end made it pop and sharpen using high pass filters. I put it on a grad black, reflected it( a bit of license there!) and gave a tickle of a shadow..

Hope that helps

Butch