I have an antique style necklace around the time of about 1850 for you. The diamonds have a corresponding semi modern European cut (with cutlet and flat girdle). The scene uses my special diamond shader (see my YT videos). Included are all meshes, the 360° animation, modifiers, materials, the shader and of course the chain.
In my video (see in the overview) I show all settings and give tips to the lightning. It is not necessary to buy this scene! You can follow everything in the video and also build the shader yourself, you can find the tutorials in my channel.
Nevertheless I'm happy if someone supports my work.