There must be a couple dozen different techniques here for faux stones with inclusions. Lots of great ideas, and no reason to stop at making simple beads. These recipes could be used to make anything with polymer clay.
Use rolling pin to make an imprint on clay. Pick a flower or plant and lay on top of a small piece of clay and use a rolling pin to make an imprint in the clay. let it harden. -These would make pretty magnets.