The object is a bullaun stone, a type of ancient carved or ground stone bearing one or more cup-shaped depressions whose precise original purpose remains debated, with suggestions ranging from liturgical water vessels to grinding tools or markers of sacred space. What makes this one quietly arresting is its placement: not lying in a field or half-buried in soil, as many bullauns are found, but mounted and displayed like a relic on the wall of the very church ruin with which it is associated.

The stone itself is a compact block of sandstone, roughly 40 centimetres wide at the top and tapering noticeably toward the base, so that seen from the side it has something of a wedge or blunted V shape. Three of its sides have softly rounded edges; the fourth, now facing west, drops away in a sheer vertical face, giving the block an asymmetry that sets it apart from more regularly shaped examples. The depression on its upper surface is circular, about 25 centimetres across and 10 centimetres deep, with sides that incline steeply inward to a narrow base. The whole stone sits within the northern half of a graveyard that occupies the site of the church, connecting it to a landscape of overlapping religious use that is common across early medieval Ireland, where church enclosures, graveyards, and portable sacred objects frequently share the same ground across many centuries.