I found this while working in my yard last summer. However, I am 99% sure that it came from gravel that I had brought in from a quarry in Indiana. It just showed up while I was moving some of the gravel around. It was clean (no dirt on it), appears to have a fingernail, and the top joint appears to have been smashed as indicated by a bulge on the side which is surrounded by a darker color which I believe is blood/blood blister...similar to what would happen if you smashed your finger with a hammer. Any thoughts? I have contacted a few people about this, but have had no luck obtaining any good information. Thanks!