The surface, measuring roughly 2.8 metres east to west and just under a metre high at its tallest point, carries some of the more elaborate examples of prehistoric rock art in County Kerry. What makes it particularly interesting is the unevenness of its survival: the eastern motifs are worn almost to nothing by weathering, while those on the western side, closer to ground level and until recently sealed under a layer of peat, are in remarkably good condition.

Rock art of this kind, generally attributed to the Later Neolithic or Early Bronze Age, typically consists of cup marks, which are simple rounded depressions hammered into stone, often surrounded by one or more incised rings. At Kealduff the carvers went considerably further. One motif on the western portion of the stone combines a cup with three gapped, spiralling rings, from the outermost of which a long curving groove runs and terminates in a separate cupmark enclosed within an oval ring. Another features two radial grooves extending from different rings, with the innermost ring bisected by a transverse groove. A previously unrecorded motif was also identified during later survey work, tucked between two of the more prominent compositions. The stone sits at 141 metres above sea level on an east-facing slope, looking out over the Behy River valley and a broad plateau of bog, with Seefin and a run of mountains from Beenreagh to Drung Hill arranged across the horizon. Whether the view was significant to those who made the carvings is, of course, unknowable, but the placement is deliberate enough to prompt the question. Scattered pockmarks and irregular patches of pocking across the surface suggest the stone was returned to, worked on incrementally, over time. Other moss-covered boulders in the same field may yet prove to carry further carvings.