Repairing a cracked sheet of baked polymer clay?

I baked a polymer clay paw impression yesterday which developed a partial crack about an an inch and a half long. It goes all the way through the piece, which is maybe a half inch thick. It's not going to break, but the paw print has extreme sentimental value and it's sort of bisected by the crack. Is there any way to fill the crack that won't impact the surface image?