On a north-facing slope above the Nier River in County Waterford, a small rectangular stone sits on top of a field bank with a circular hollow worn or carved into one corner of its upper surface. That hollow is a bullaun, a type of artificial basin found on stones across Ireland and often associated with early Christian or pre-Christian ritual use, though their precise origins and purposes remain debated. This particular example is modest in scale, measuring roughly half a metre by 45 centimetres and standing about 30 centimetres high, with a basin 30 centimetres across and 15 centimetres deep. Its position on a field boundary, rather than within any obvious enclosure or ecclesiastical site, is part of what makes it quietly unusual.

The stone is made of conglomerate, a sedimentary rock formed from compressed fragments of older stones, which gives it a rougher, more varied texture than the smooth limestone or granite more commonly associated with bullauns. Its placement on the bank overlooks the Nier River roughly 200 metres to the north, and a possible standing stone lies approximately 56 metres to the south. Whether the two features are related is not established, but the proximity is enough to suggest that this particular corner of Graignagower may have carried some significance across a long stretch of time. Bullaun stones were sometimes used for grinding, sometimes as vessels for water believed to have curative or protective properties, and the basins on some examples were said to hold rainwater that could not be emptied without ill consequence.