It is a bullaun stone, a type of ancient carved rock bearing one or more cup-shaped depressions hollowed into its surface. These stones are found across Ireland and are generally associated with early Christian or pre-Christian ritual practice, though their precise original function remains debated. Some were likely used for grinding or processing materials; others seem to have acquired devotional significance over time, with the water that collects in their hollows sometimes considered to have curative or protective properties.

This particular example is modest in size, measuring roughly 38 centimetres by 29 centimetres, with a thickness of around 22 centimetres. It lies beside the enclosure boundary associated with the Ennereilly graveyard, a site with its own distinct archaeological record. Granite was the material to hand in this part of Wicklow, and the stone's survival on the edge of a burial ground is fairly typical; bullaun stones frequently endured in such locations, partly because the sanctity attributed to graveyards offered a degree of protection from disturbance or removal.