This is a bullaun stone, a type of ancient rock monument found across Ireland in which one or more basin-shaped depressions, called bullauns, have been carved or worn into a fixed boulder. Their precise purpose remains debated; they are associated variously with early Christian activity, folk ritual, and the grinding of grain or pigments, though most cannot be pinned to a single function with any confidence. The Curralanty example sits on rising ground, an earthfast boulder measuring roughly 1.5 metres by 1.5 metres and only about 0.4 metres high, broad and low in the landscape.

The boulder carries two features on its upper surface. The main bullaun is centrally placed, circular, and reasonably deep, measuring 0.38 metres across and 0.2 metres down. On the north-eastern side of the stone there is a second, much shallower depression, only 0.03 metres deep and 0.2 metres in diameter, barely more than a faint dish in the rock. Whether this second hollow was intentionally made or is simply the result of natural weathering in the conglomerate is not recorded. What gives the site additional interest is its proximity to a moated site located roughly 200 metres to the west. Moated sites are a particular feature of medieval Ireland, typically consisting of a raised platform or enclosure surrounded by a water-filled or wet ditch, and they are generally associated with Anglo-Norman settlement from the thirteenth and fourteenth centuries. The pairing of a bullaun stone with a nearby medieval enclosure is not unusual in the Irish landscape, though it rarely comes with a tidy explanation of how or whether the two were connected in use.