The coral, rock, or fossil(who knows) actually came out of a creek in Indiana in the middle of nowhere. I was probably about 12 yrs old and stumble acrossed it and kept it since. Its kinda shaped like a big clam and the bottom doesn't pertrude like the top, it smoother and dark greyish. I wish I could find out what it really is, but where do you start. Anyway if anyone knows or thinks they know of what it could be let me know
Wow that is really cool
Maybe some people over in the Indiana Forum could help you out if you provide a picture?