Add realistic cut gemstones to a ring model and slightly adjust settings (for a web 3D customizer)

I have a finished 3D ring (I provide the .blend and .glb). The band is done. Your job: replace the stones with realistic, properly cut gemstones and rework the settings so the metal wraps around the gems, as in my reference. The closer to the reference, the better. The stones must look like real cut gems in a real-time web viewer (three.js / WebGL, glTF), not glass, plastic, or a flat coloured blob. They must catch light and sparkle when the ring is rotated. Reference for the quality I want: https://www.stonealgo.com/custom/engagement-rings/custom-ring-builder/?design=DUrTWVocZxaPlFyXU0gicA — it does not have to match this exactly, but the stones should look real. Please read before applying I have already worked with two freelancers who both said they could do this and could not. In their files you can clearly see the gems have the wrong facets and shape and do not transmit light like real stones, they look like opaque plastic or a flat coloured pattern, with no sparkle or depth. So I am being specific this time. Only apply if you can genuinely meet every point below and show proof. Requirements Real cut-gem geometry — properly faceted (e.g. oval brilliant, ~57 flat symmetric facets, correct proportions), not a bumpy or low-detail mesh. Accurate standard cut-gem models are fine. Built the correct way round — start with a real, full-depth gemstone (with its pavilion), then wrap/adjust the metal setting around it. Do not flatten or deform stones to fit shallow settings. That is exactly what went wrong before. Metal stays metal (metallic, not flat grey) and the settings under the stones are solid, not transparent. Colour comes from the material, no baked colour or noise textures on the stones. Stones as separate meshes, so different colours can be assigned. Clean file size (stones should not push the file past ~10 MB). How you set up the materials is up to you, you are the expert. I judge only by the result in a standard viewer, not the method. Proof and delivery Test the final .glb in https://gltf-viewer.donmccurdy.com and send a short screen recording of the ring rotating there. An offline Blender/KeyShot render is not accepted, it does not show how it looks on my website. Deliver: the updated .glb and the source .blend. To apply Send an example of a real-time / glTF / Sketchfab gemstone you have made (not an offline render), so I can see the quality live. Applications without a real-time example will not be considered.