Photorealistic Jewelry Rendering Needed

I have a collection of fine-jewelry pieces that I need presented as ultra-realistic, studio-quality renders. The goal is to make every metal surface, gemstone facet, and minute engraving look indistinguishable from a real product photograph, ready for both web and print use.

Here is what I expect:
• High-resolution stills of each piece—multiple angles that clearly showcase craftsmanship.
• Accurate material, lighting, and shadow work so that gold, silver, diamonds, and coloured stones read correctly without post-production touch-ups on my end.
• Final files delivered as lossless PNGs (transparent background) plus layered source files so I can make minor tweaks later if needed.

When you respond, attach a detailed project proposal that walks me through:
• Your rendering pipeline (software, plug-ins, render engine, colour-management workflow).
• How many review rounds you include and typical turnaround per item.
• Any past examples that prove you can hit true photorealism with jewelry—rings, necklaces, earrings, or similar intricate products.

I’ll review proposals based on clarity of process and visual quality of previous work, then move quickly to award so we can get started.