Harvest the clay and dry it out, if it’s wet.
Pound the dry dirt clods until they crumble apart to dust. Remove as many rocks as possible, as well as sticks and any botanical material you find.
Gather 1 cup of dried clay and start adding water to it in 1 tablespoon increments. Mix the clay and water with your hands, allowing the clay to fully absorb the water.
Begin shaping the damp clay into a ball. Add only enough water to get the ball to glue together.
Smooth the sphere as much as you can with your hands and once it's sufficiently round, wrap it loosely in parchment or wax paper. You can really wrap it in anything that will enable the ball to dry, but slowly. If it dries too quickly, it will crack and you’ll need to start over.
Allow the ball to sit overnight or for as long as it takes for the surface to dry out enough that clay no longer sticks to your fingers when you touch it. You should be able to run your finger over the surface and not make an indent. It will feel dry, even though the core will still be damp.
Use a very smooth stone or any smooth surface to repeatedly rub and rub the surface of the ball. This aligns the clay particles and stacks them so that the ball will be solid and, eventually, shiny.
Once the ball is hard and shiny to your liking, buff it with a soft cloth and display it in a safe place or wrap it well to give as a gift.