Neither the 1842 nor the 1904 Ordnance Survey six-inch maps recorded it, which means it passed through two separate rounds of systematic surveying without making it onto the official record. That absence is quietly puzzling for a stone standing over a metre tall in open rough pasture, the kind of feature that tends to catch a surveyor's eye.

The stone itself is subrectangular in plan and cross-section, roughly 1.15 metres high and 1.35 metres along its longest face, and it leans noticeably to the east. Its long axis runs northeast to southwest, an alignment that may be deliberate, though standing stones of this type, large upright slabs set into the ground in prehistory, are not always easy to interpret without excavation. What makes this particular stone more legible as a site is that it does not stand alone. It is one of a group of three standing stones in the immediate area, a configuration that hints at some kind of organised, intentional landscape arrangement rather than a single isolated monument. Whether the three were raised together or accumulated over time is not known, but their grouping sets Glenaknockane apart from the many solitary examples scattered across the Irish countryside.