What makes it quietly remarkable is not just its age or origin, but the fact that when it was found it had already been reused, placed as the footstone of what researchers call a pseudo grave, a grave-shaped feature that may not have contained a burial at all. The slab's decorated face carries an incised cross enclosed within a double ring, and where the arms of the cross meet the outer ring they split into forked, oblique terminals, a detail that lifts the carving from the functional to the considered.

The slab was recorded by Fisher in 2014 and had originally stood in the northern half of the graveyard on High Island, a site long associated with early medieval monasticism. Measuring 0.59 metres high, 0.32 metres wide, and just 0.07 metres thick, it is a modest object that rewards close attention. Only its eastern face was decorated, which is consistent with the liturgical orientation common to early Irish grave markers, where the east, associated with resurrection, carried the greater symbolic weight. The fact that it had almost certainly been reused before Fisher recorded it suggests the slab had already passed through more than one chapter of use by the time it was lifted from the island. A replica now stands in its place on High Island, so the original design remains visible in both locations, separated by several miles of Atlantic water.