That hollow is what matters. It marks the stone out as a bullaun, a type of worked or naturally hollowed stone found widely across early Christian Ireland and generally associated with ecclesiastical sites, holy wells, and local ritual use. The water that collects in a bullaun hollow was often credited with curative properties, and many such stones were treated as sacred objects tied to a particular saint or place.

This example is modest in its dimensions, measuring roughly 0.31 metres by 0.26 metres, with the surviving portion of the hollow running about 0.19 metres across and 0.1 metres deep. The fact that it is described as a fragment suggests the stone has broken at some point, and only part of the original hollow survives. It was recorded on top of the north wall of the adjacent medieval church, which raises the quiet puzzle of how it came to rest there, whether placed deliberately, reused as building material at some earlier point, or simply moved over the centuries as the church fabric settled and shifted. The association with the church at Labbamolaga is significant; the site takes its name from Saint Molaga, an early Irish monastic figure connected to this part of north Cork, and the presence of a bullaun fits a pattern common to early ecclesiastical enclosures throughout Munster.