New to Blender. Using 3.1. This is my first attempt at creating photorealistic procedural materials. These are cast and 3D printed metals I use in my jewelry designs. This is my first step in creating new and improved renders for all my jewelry listings. I was trying to match the appearances of the actual metals of the finished jewelry that I have made before. 
So far, I’m pretty happy with results. This test render is in Cycles.
