The boulder is earthfast, meaning it is fixed in the ground rather than freestanding, and measures roughly 2.2 metres in length and 1.4 metres across. Into the wider end of its relatively flat top surface, someone at some point cut an oval basin approximately 37 centimetres across and 12 centimetres deep. This is a bullaun stone, a type of monument found across Ireland in which one or more cup-shaped depressions have been ground or carved into rock. Their origins and purposes are debated, but they are frequently associated with early ecclesiastical sites and are sometimes linked to folk beliefs about the curative or ritual properties of the water that collects in the basins.

What makes this particular example quietly unsettling is the evidence of what nearly happened to it. Two holes have been drilled into the stone, one into the side of the basin itself and a second at the opposite end of the boulder. The pattern is consistent with the preparatory work of stone blasting, a technique in which holes are bored by hand and then packed with explosive to split a large rock, typically to clear land or harvest building material. The attempt, for whatever reason, was never completed. The basin survives intact, and the boulder remains in the field where it has always sat, though now bearing the marks of both the person who carved it and the person who once intended to destroy it.