Blender Jewellery glTF Animations

I have a collection of jewellery pieces that are CAD ready and need to be created as glTF so that it work on a configurator and I can enable customization using front end technology

For every piece you will:
• Set up a smooth rotating turntable sequence.
• Add a subtle zoom-in and zoom-out cycle to draw attention to details.
• Introduce convincing light-reflection passes so diamonds and metals sparkle naturally, without overpowering the scene.
Have layers on the GLTF files so that I can show/hide using a custom software we already have created

The glTF format must remain clean and lightweight after animation, so please optimise keyframes and textures before delivery. Final output should include the updated .blend files plus the animated .gltf or .glb versions ready to drop into our viewer.

I’ll supply the current models and reference videos of the mood we’re after the moment we start. Looking forward to seeing how you can make each ring, pendant and earring shine.