Implementations of pet tags and related protective and alignment features. A pet tag may comprise a raised edge of a concave design, a recessed design or a bordered design. Single or multiple piece implementations may be used to protect an image to be marked on one or both sides of a pet tag. Implementations may comprise multiple pet tags pre-assembled or assembled after marking to further protect one or more images marked on the tags. Other implementations may comprise removable brackets to adapt the pet tags to particular marking kiosks. Still other implementations may comprise crystals embedded in the marking substrate with an additional substrate coupled to a rear side of the marking substrate.