Dueling Trumpets Cunto es una micra?. This incredibly detailed ring has four trumpets nestled among each other within a swoop of color in a layer underneath. The color can be any of the anodized colors available. 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. The ring is comfortable to wear and can be engraved on the inside. Note in the Comments whether to anodize the inside or keep it polished.