It measures less than sixty centimetres in length and barely reaches knee height, but set into one of its surfaces is a smooth, circular hollow, roughly a quarter of a metre across, worn deliberately into the stone. This is a bullaun stone, a type of early medieval carved rock found across Ireland, typically associated with early Christian sites. The precise function of bullauns remains a matter of debate among archaeologists; some were likely used for grinding, others appear to have accumulated sacred or ritual significance, and many are still associated in local tradition with healing or with the granting of curses, the water that collects in the depression considered potent in some way.

The stone itself is irregular in shape, neither cut nor dressed, which is typical of the form. What matters is the depression, not the boulder that carries it. The shallow hollow, about twenty-five centimetres in diameter, sits on a single surface of the rock. Bullauns like this one are frequently found in graveyards and at early ecclesiastical sites across the country, suggesting they were either originally placed there or, in some cases, gathered to such locations over time as places of continued local significance. The Ardagh graveyard in which this example sits is recorded as a separate monument in its own right, and the bullaun is catalogued as one of a cluster of features associated with that site.