But this is a bullaun stone, a type of ancient carved rock found across early Christian Ireland, distinguished by a deliberate circular depression ground into its upper surface. The one at Kilbeg, known in Irish as An Chill Bheag, sits on the southern side of a subrectangular enclosure roughly thirty metres east of Kilmore, and beside its central hollow someone has carved a small Latin cross. That combination of bullaun and cross inscription, alongside three further cross-inscribed stones within the same enclosure, suggests this was once a working penitential site, a place where people came to pray through prescribed physical acts, moving between stations marked by sacred stones.

Bullaun stones are thought to have functioned variously as fonts, grinding hollows, or focus points for devotional ritual, and the precise origins of any individual example are rarely clear-cut. At Kilbeg, the Ordnance Survey maps noted what appear to be penitential stations here, lending some documentary weight to the site's devotional character. The stone itself is described in J. Cuppage's 1986 archaeological survey of the Dingle Peninsula, which recorded it as roughly dressed, its depression measuring 31 centimetres across and 11 centimetres deep, with the V-shaped notch on one edge giving it a slightly irregular, purposeful profile. The crude base on which it stands suggests it was deliberately elevated, treated less as a loose field stone than as something to be displayed or approached with intention.