I have two rocks in particular that I'm trying to identify. I believe one may be a "worry stone". It's flat and shiny on both sides almost polished. The other I believe may also be a worry stone but not flat...there is the slightest wear and the rock is shiny in those areas. The larger is heavy for it's size and is matte black with red/caramel colored stones embedded in it like candy. Oh if it helps I have found several other artifacts like round stone game ball, spear head, hammer stones, etc. Here are the photos: Red/black rock: Here is the black with white-ish bands: Please don't move this to the hobby section!