The original findspot lies at Inchincummer in County Kerry, where the stone was unearthed when a field bank was being levelled. That bank ran across the site of an ancient enclosure, the kind of circular or sub-circular earthwork that would once have defined a farmstead or ringfort. The stone is small, just 0.60 metres in length, and what survives of it is a fragment rather than a complete monument.

Ogham is an early medieval script, used primarily in Ireland between roughly the fourth and seventh centuries, in which letters are represented by a series of notches and strokes cut along the edge of a stone. The inscription at Inchincummer is damaged but legible as far as it goes, reading RUDDAG(G) before breaking off. Scholars have suggested it probably originally ended with NI, which would make it a genitive form, naming the stone as belonging to or commemorating a person whose name corresponds to the later Irish Ruadhán. That name, familiar from early Irish saints' lives and place names, offers a thread back into a world of personal identity that predates written records by any other means. The stone was found by the landowner during the levelling work, and it has since been moved to the front garden of a nearby house, leaving its original context, the old field bank and the enclosure beneath it, behind in the field at Inchincummer.