Retouching for Jewelry Images

I have several images of a ring. I'd like these images cleaned up— there are uneven reflections in the metal—and I'd also like the ring made to pop more like the reference image attached. No need for the addition of a lens glare. Obviously they will need a good crop as well. There are two photos attached here, but there may be several more that we can address at a per-image rate. Please note I only have .jpg files, not RAW... From what I can tell. PLEASE INCLUDE EXAMPLES OF RELEVANT WORK IN YOUR RESPONSE :) Although this is marked as a one-time project, I expect to have many more tasks like this in the future—so there is a potential here for something ongoing!