The stone itself is modest in size, roughly 96 centimetres by 70 centimetres, yet its surface carries an elaborate composition that prehistoric carvers worked into the rock by a technique called picking, striking the stone repeatedly with a harder point to produce shallow marks. What they left behind is a central cupmark, a simple round depression, ringed by nine concentric circles, with two short arcs suggesting a tenth. A radial line cuts outward from the roughly two o'clock position, running through every ring and extending beyond the outermost. Above the main design, ten smaller cupmarks cluster together, partly overlapping the circles and loosely enclosed within a lightly picked arc of their own. Further left, a satellite cup and ring arrangement attaches itself to the composition, and beyond that, four or five irregular cupmarks and dots trail off into the stone. It is a design type found scattered across Atlantic Europe, most densely in Ireland, Britain, and Iberia, and still not fully understood.

The stone was found around 1886 on the Ponsonby estate, which was centred on Inchiquin Castle in the neighbourhood of Youghal, County Cork. How it came to leave that landscape is not recorded in the available sources, but by the time the scholar Shee documented it in 1968, the stone had already passed out of its original setting. Its recorded findspot is catalogued separately in the Cork sites record. The description published here derives from the Archaeological Inventory of County Cork, Volume 2: East and South Cork, produced by the Stationery Office in Dublin in 1994, with revisions ongoing into 2016.

The stone is now held in the National Museum of Ireland, whose main archaeology collections are displayed at Kildare Street in Dublin city centre. The museum does not always have every object from its collections on open display, so it is worth checking in advance whether this particular piece is accessible to visitors at any given time. For those more interested in the landscape where the stone originated, the Cork record reference CO067-055---- points to its original location in the Youghal area, where the broader context of the Ponsonby estate and Inchiquin Castle can be explored separately.