Ancient Throwing Stone or Tool? South Carolina landscape surely these two have seen

surely these two have seen some things

and casting such great shadows

and I've become quite a keen inspector of pieces

and I just found it all these  eyes and ears and noses and mouths together pretty striking

The upper right corner was neatly cut away at some point but backed with a similar blue so does not especially  jump out

Ancient Throwing Stone or Tool? South Carolina landscape surely these two have seenI purchased this from a wonderful dealer in New Hampshire whose cabinet of curiosities includes objects decommissioned from museums and science departments as well as gathered from estate collections all over. She didn't know the origins of this stone and neither do I, but it sure looks like a throwing stone to me! If not certainly used as a tool of some sort, with a couple of divets on the bottom one just the right shape for a thumb gripping it.