It is a bullaun stone, a type of ancient carved rock featuring one or more cup-shaped depressions ground into its surface. The precise origin and purpose of bullauns remains a matter of scholarly debate; they are found across Ireland, often near early ecclesiastical sites, and the water that gathers in their basins has long been associated with folk cures and ritual use.

This particular example is roughly subrectangular in shape, measuring 0.62 metres in length and 0.57 metres in width, and rising to 0.46 metres in height. Its single basin is relatively generous, at 0.25 metres deep, though a section of the boulder has broken away on the western side, leaving the stone incomplete. The basin diameter, recorded at 27 centimetres, would have held a considerable pool of standing water. Its placement within an existing burial ground connects it to a wider pattern seen elsewhere in Galway and beyond, where bullauns appear alongside early Christian or pre-Christian funerary and sacred spaces, hinting at a landscape that accumulated layers of meaning across different periods.