The stone is only partly visible, the rest still overlain with peat, which means that what can be seen now may represent only a fraction of what was originally carved.

The upper surface carries a vocabulary of motifs that are characteristic of prehistoric rock art in Ireland and Atlantic Europe more broadly: cup-and-rings, in which a simple cupmark is surrounded by one or more concentric carved circles; plain cupmarks; mini-cupmarks, which are smaller and shallower than the standard form; grooves connecting or running between motifs; and a keyhole motif, a form less commonly recorded than the others and one that gives this particular surface a degree of distinction. Rock art of this kind is generally attributed to the Later Neolithic or Early Bronze Age, a broad span running roughly from 3500 to 1500 BC, though the precise function of the imagery remains genuinely unknown. The Kealduff site was identified and described by Aoibheann Lambe, whose documentation brought it to wider attention.