The gigantic horn has numerous scratches and cracks. An unusual metal object is lodged into the rough surface.
Upon further examination, you notice that the metal is actually a broken axe head. On the metal, the following words are etched:
Property of Mountaineer Pebblebitty.
When you try and dislodge the broken axe head, it shatters into a million pieces.
What have you got there? A fake obviously!
I've been face to face with Margol and I know for a fact that her horn is at least eight times larger than the one you've got in your hands, <name>. You probably got that off of a stormsnout in the Barrens. No ma'am, you can't fool Pebblebitty!