What gives this one at Rooska its quiet interest is the care still visible in how it was put up: packing-stones remain on the ground surface around its base, the ancient wedging material used to stabilise the upright when it was first erected, still doing its job after what may be several thousand years.

The stone stands 1.65 metres tall and measures roughly 1.1 metres by 0.8 metres, trapezoidal in plan, meaning it has the rough shape of a trapezoid rather than a simple rectangle or irregular lump. It leans slightly to the north-west, and its long axis runs north-west to south-east. That orientation is unlikely to be accidental; many prehistoric standing stones in Ireland appear to have been aligned with solar or lunar events, though what specific purpose drove the people who raised this one remains unknown. It sits in an east-west hollow between rocky ridges to the north and south, a sheltered channel of rough grazing that would have been a natural corridor through the landscape. Whether the hollow influenced the choice of location, or the stone was placed here to mark movement through it, is an open question.