Originally Posted by klee777
...After reducing the saturation, in order to remove all grey reflection, I plan to use either a dodge tool, a brush with 5 % opacity, a mixer brush, a patch tool, a spot healing brush, a healing brush or a clone stamp tool, but I know it will be very time consuming.
Do you have any other recommendation I haven't thought?
I assume you meant to say removed the red not grey reflections? And another assumption that you want to clean up the metal areas surrounding the grey centre of the pendant?
I think the patch and clone tools should work quite satisfactorily on these areas and I would suggest applying them via a new layer. Should you need to just lighten certain aspects the dodge tool works ok and again use it on its own copy of a layer. But you would have a little more control to D&B on a 50% grey layer set to either Overlay or Soft light - paint on the layer with white to lighten and black to darken start with low opacity brush and build up with strokes as required