What sets it apart is the deliberate circular hollow ground into its upper surface, a feature that places it in a category of objects that have quietly puzzled and fascinated antiquarians for generations. This is a bullaun stone, a term used for stones bearing one or more cup-shaped depressions, likely ground by hand over long periods. Their precise original purpose remains a matter of debate, though they are frequently associated with early Christian and pre-Christian sacred sites across Ireland, and the water that collects in their hollows has traditionally been credited with curative properties.

The stone itself is compact, measuring roughly thirty centimetres by twenty-seven centimetres across and twenty-six centimetres in height. The hollow scooped into its surface is twenty centimetres in diameter and seventeen centimetres deep, which is substantial relative to the overall size of the stone. Before arriving in its current garden setting, it was kept in a nearby farmyard, the kind of quiet, unrecorded domestic custody that has preserved many such objects across the Irish countryside, often without any formal acknowledgement of what they are or what they may once have meant.