Worked into its surface is a hemispherical depression, roughly eight centimetres across and three centimetres deep, the defining feature of a class of stone known as a bullaun. These cup-marked stones appear across Ireland, often near early ecclesiastical sites or holy wells, and while their precise original function remains debated, they were long associated in popular tradition with healing, cursing, and the grinding of votive offerings. The stone itself is modest in scale, measuring just under forty centimetres by twenty-nine, and irregularly shaped, yet the small hollow ground into it speaks to repeated, purposeful use over a very long period.