The focal I used is called Fordite or Detroit Agate. This material was created many years ago at the Ford Rouge Plant just outside of Detroit, Michigan. Layer upon layer, paint over-spray built up on metal racks that transported new car bodies through the paint shop, and into the oven, where each coat was baked hard. This process of painting cars is no longer used so the material is rare & coveted. It's a piece of Michigan history!!! This is the real deal, authentic Fordite from Michigan source (Etsy Shop- SuzyBones) & created by me, a Michigander!!! I bezel set the cabochon (just over 1 1/2" x 5/8" at widest) in fine silver .999 to a hammered and shaped adjustable sterling silver hammered band. This Fordite has a stunning sparkle vivid colors! Band is 1/2" & size is 8, but is adjustable up about 1- 1.5 sizes. Sizing down is free...just let me know your size! With a ring band this wide it is best to figure about 1 size larger than what you would normally wear with a thinner band ring. Thanks for looking! *Comes boxed with Fordite story card! :)