Why not just record a microscopic look at some specific quadrant of the items? It seems like there'd be at least as much entropy to exploit that way as with th

Why not just record a microscopic look at some specific quadrant of the items? It seems like there'd be at least as much entropy to exploit that way as with these metal fragments. I don't mean just a photo, but some way of describing a fairly stable quality of the material at a level of detail minute enough to ensure sufficient entropy.