A broken cross-slab, now kept in the stone store at the visitor centre, carries incised crosses on both of its faces, a detail that sets it apart from the more straightforward decorated stonework elsewhere on the site. The slab is only about five centimetres thick, giving it a surprisingly slight, almost utilitarian quality for an object that was clearly intended as a marker or devotional surface.

The stone was described by Harold Leask in his 1950 study of Glendalough, where he catalogued it as part of a rough cross-slab bearing a small Greek cross, that is, a cross with arms of equal length, incised on one face. The reverse carries a similar cross, but with an additional cross placed at its upper extremity, a compositional choice that remains a little puzzling. Leask's description flags it as a fragment, so whatever the slab's original size and setting may have been, only this portion survives. The area known as Sevenchurches is the traditional name for the Glendalough valley complex, reflecting the number of ecclesiastical buildings that once clustered there across several centuries of monastic activity.

The slab is held in the stone store rather than displayed outdoors, which means it is not something a visitor will simply encounter while walking the site. Access to the stone store would depend on the visitor centre's arrangements at any given time, but knowing the piece exists and to ask about it is half the work.