At just 0.75 metres high and 1.2 metres long, the standing stone at Carrigonirtane is a modest presence, subrectangular in plan and oriented with its long axis running west-northwest to east-southeast. That orientation is the kind of detail that tends to catch the attention of archaeologists, since many prehistoric standing stones across Ireland show deliberate alignment, whether to solar events, landscape features, or other monuments in their vicinity.

What makes this particular stone quietly interesting is its relationship to the wider landscape around it. Roughly 100 metres to the north lies what the archaeological record describes as an anomalous stone group, a cluster of stones whose character and purpose do not fit neatly into a recognised category. The proximity of the two features raises the possibility that they were connected in some way, perhaps forming part of a broader ceremonial or territorial arrangement, though the evidence does not allow for firm conclusions. Standing stones of this kind generally date to the Bronze Age, somewhere between roughly 2500 and 500 BC, though without excavation it is rarely possible to assign a more precise date to any individual example.