This is one of the most advanced Blender 3D rings on the market. It uses multiple scenes, layers, and a mask to make the diamonds look as realistic as possible. The diamonds use a special shader to give them rainbow dispersion just like a real diamond. It uses these methods because when the diamonds are in the ring they can not receive enough light for good dispersion. I found a work around that let the light pass through the ring and into the diamond with out effecting the ring. Also the gold ring material is PBR and can be changed to any color. The ring and diamonds are parented to an empty object. This model also has super fast rendering time because you do not have to render the whole image at high samples just because of the diamonds. In this model you can change the amount of samples for the diamonds only making for super fast render times. For example you could render the ring at 200 samples and the diamonds at 1200 samples.
Features

>Advanced render set up to ensure realistic diamonds >Realistic rainbow dispersion >Custom material for diamonds >PBR materials >Faster render times

Note: Due to advanced methods used in this model appending this model to your scene can be quite confusing. Here is a tutorial on how to append this model to your scene : youtu.be/H6grNXBA60g