Here's a ring that will get noticed!  Python is laser cut and laser engraved and anodized in a color of your choosing.  While it is possible to anodize an outer surface, it would easily scratch, so it's best to be done only down in the grooves.   Note that cobalt chrome cannot be anodized, and black zirconium will remain black.  This ring also has anodizing on the inside.  If you would like that, just mention it in the Comments section.