It measures roughly half a metre across and less than twenty centimetres deep. Unassuming to the point of near-invisibility, it is a bullaun stone, one of the more quietly persistent mysteries of the Irish early medieval landscape.

Bullauns are cup-shaped depressions found in rock outcrops or loose boulders, often in proximity to early ecclesiastical sites, graveyards, or holy wells. Their precise function remains a matter of debate among archaeologists; they have been interpreted as grinding hollows, as basins for water used in ritual or healing, and as penitential stations where small stones were rotated in prayer. The association with sacred ground is consistent enough across Ireland to suggest some kind of devotional or ceremonial role, even where documentary evidence is absent. The Lissagriffin example sits immediately to the south-east of the graveyard, a positioning that fits this broader pattern neatly. The graveyard itself is associated with an early Christian site in the area, placing the bullaun within a landscape that has carried religious significance for well over a thousand years.