I was out on a field trip into an Eocene Florida Quarry. I found what we were supposed to find: Echinoids; seashells; fossilized sponges. Others found Crabs like Ocalina Floridana.   Then I picked up this broken shark tooth. There is no fossilized shark tooth like this in any of the Florida areas (non_Eocene) that I hunt. So this is a first for me. Looks a little like a Mako but it has a cusp AND the cusp has a cusp. So, what is this Shark tooth, and can I buy one also found in th