I learned about this bead technique from a fellow esty team member. Each side of the bead has a different mirror image design. It's a perfect way to use up scrap clay. The clay is cut and turned so the design you see is actually from the inside of the clay. You can find how to make these if you search for natasha beads on you-tube.
Check out this bead. One side of the bead has kind of a creepy face!