This is a bullaun stone, a type of rock with one or more cup-shaped basins ground into it, found at early Christian and pre-Christian sites across Ireland. Their exact original purpose remains debated, though they are frequently associated with ritual use, and many later acquired reputations as healing stones. What makes this particular example quietly compelling is not just the stone itself but the density of early medieval remains immediately around it: a second bullaun stone lies only twelve metres to the west, a holy well sits twenty-one metres to the north-north-west, and the medieval church of Ullard stands roughly fifty metres to the south.

The church and holy well are both dedicated to St Fiachra, who according to tradition established a foundation here in the latter part of the sixth century, a dating recorded by Vigors in 1893. The bullaun itself measures 1.45 metres in length, tapering in width from around 0.07 metres at its narrowest to 0.52 metres at its widest. It carries two basins: one oval, measuring approximately 0.28 by 0.22 metres, and one sub-circular at roughly 0.16 by 0.18 metres, each about 0.1 metres deep. The hollows are modest in size but clearly worked, not the result of weathering or accident. A hawthorn tree, a species long associated in Irish tradition with sacred and boundary places, stood beside the stone when it was examined in 1994, though it was gone by a later visit.