A bullaun is a large stone, often a boulder or a fragment of bedrock, into which one or more cup-shaped hollows have been ground, almost certainly by human hands. They are found across Ireland in their hundreds, frequently close to early Christian sites, holy wells, or places of older, harder-to-name significance. The hollows fill with rainwater, and in many places that water was, and sometimes still is, considered to have curative or spiritually potent qualities. How the stone at Moyne sits within that tradition, whether beside a ruined church or out in open ground, is not currently documented in any accessible public record.