Activity James Woods posted an image in the group What is it? from the myFOSSIL app 1 year, 1 month ago 1 year, 1 month ago 1 year, 1 month ago This looks similar to a horse tooth. But different . Uploading a few more pictures. Any clues to what it is. St. John’s River Jacksonville Fl. #fossil James Woods replied 1 year, 1 month ago Looking at Mammoth tusk fragments I believe that is what it is. Any thoughts from anyone? Jeanette Pirlo replied 1 year, 1 month ago Def looks like a mammoth tusk based on the concentric rings on the interior Catherine Carr replied 1 year, 1 month ago Duh! I just saw this after posting my suggestion! Interesting!