This is a bullaun stone, a type of worked rock found across early medieval Ireland in which one or more cup-shaped depressions were ground or pecked into the surface, most likely for ritual or functional purposes associated with early Christian sites. The stone itself is modest in scale, measuring roughly half a metre across and fifteen centimetres deep, with a depression about twenty-eight centimetres in diameter. A portion of the boulder has broken away and is now lost, though enough survives to read the original intention clearly.

The surrounding site, known as Kilcumlaghta or Cill Cumnachta, carries several layers of use compressed into a single quiet location at the entrance to Gleann Locha. Within the enclosure are the foundations of a church and numerous grave markers associated with a calluragh, an informal burial ground typically used for unbaptised infants or others excluded from consecrated parish cemeteries. Loose within the site lies what appears to be a porthole-slab from a souterrain, an underground stone-lined passage or chamber associated with early medieval settlement, and in 1945 a fragment of a rotary quernstone was recorded here as well. The presence of the bullaun, the quernstone fragment, and the souterrain slab together suggest that this valley entrance was a place of some sustained activity across several centuries, though the precise chronology of each element is not easy to pin down. The site was documented in the 1986 Dingle Peninsula archaeological survey compiled by J. Cuppage for Oidhreacht Chorca Dhuibhne.