Editing gold jewelry

As the others said. This isn't done with Photoshop; this is done with lighting.

To get perfectly neutral and diffused light, and a clean white backdrop, you use a light tent with backlight:

Then you get something like this:

However, if you really want to show the gold/silver shiny surface, you need controlled reflections, and a play of light and dark. This can be done with large softboxes.

I'm with @pixxxelschubser on this one. You need much better quality photos in the first place. Your image has massive compression artifacts which will make even a basic Hue/ Saturation adjustment bleed into the background. In your case a selective adjustment and removing some of the Cyans and Blacks would probably be required, but it will also change the grey. The Cartier example is completely fake on the other hand. You can literally see how the replaced the reflections with gradients and smoothed out the rest with blurs and brushes. That may have taken some poor sap two days just for this set of photos until they were polished. For my taste the gold is too brown and looks like cheap "Russian Gold" with lots of copper in it, though.

Mylenium

Hi @lvmonti 

That's probably not what you want to hear.

But: Have you tried to take a better picture with higher resolution under better lighting conditions with another camera? That would probably save you some post-processing in Photoshop.

Can you post the image, or part of the image, that you are trying to correct?

Dave