Holy smokes. That's a big tooth. Very cool.
I may have to invite you down to the beach for a few days to teach me how!! Hahahhahaha I couldn't find one if I stepped on it!My favorite past time while on Vacation is to walk the beach looking for sharks teeth. I have found thousands. Mostly small teeth but have found some good ones but nothing like the ones in the OP. All mine have came from the Myrtal Beach area.