Ancient Throwing Stone or Tool? greyhound plate 75" long x 1 3/8"

75" long x 1 3/8" wide x  1

Resignation

All carved by the same person (united especially by the shape of their mouths) and with at least a little age to them for sure

The paper size is just shy of that

13 1/4" x 9 3/8" x 3 1/8"

Ancient Throwing Stone or Tool? greyhound plate 75" long x 1 3/8"I 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.