Fieldstone - A stone taken from the ground’s surface. Often placed at the head and sometimes the foot of a grave to mark its location. Fieldstones are found primarily in graveyards that were established before sources of gravestones were available in the area, or where lack of stone carving skills or limited economic circumstances made use of fieldstones necessary.
Sometimes there will be names and/or dates etched into them.
And many times the fieldstones may be small and unnoticed.
This one could have easily been overlooked. But it was in a long row of different fieldstone markers in the middle of a cemetery in Missouri.