Bet You'll Never Guess . . . .

 . . . what this week's mystery artifact might be!  The object is made of two pieces of wood tied together with a sturdy piece of rope threaded through two holes on each piece of wood:

The object can be opened to reveal an oval hollowed-out space on one side and an egg-shaped protrusion on the other:

It appears to be handmade.  I will even give you a tiny hint - it has nothing whatsoever to do with Halloween!  (Try as I might, I was not able to find any Halloween-related objects in our collection).

Take your best guess and post it in the comments section below or on our Facebook page.  Good luck!