Use the brayer to roll it out to the same thickness. This will become the pocket. Shape it into a rough square and position it to look like a diamond. Stamp the message design in the center. You can then stamp spiral or other designs along the outside edges.
Press holes into the bottom of the clay pocket using the stylus.
Place the pocket onto the back piece and stuff it with cotton to give it shape. Allow the clay to dry overnight, and turn it over occasionally. Once the clay has dried, remove the pocket. Rub the bottom edge of the back piece with ink. Sprinkle the verdigris powder onto the ink and heat until melted.