Hi guys.
I actually did these renders to help out a person in the forum, but i thought i maybe of interest to others.
I didnt spend much time modeling the ring, i was mostly trying to get the renders correct.
I have labeled each pic with the type of render.
The HDRI was only used for reflections and not for lighting.
One spot light used in each render.
With each render i tried to keep the main setting as close as possible to the last.
Hope you guys find it interesting, or maybe even helpful.
Sorry about the large pic size, but i didnt want to compression and size to kill the result between each render, concidering thats why your looking at them, to compare.

Cheers all
Nick