This ancient monolith stands on relatively level ground that slopes gently westward towards the waters of Lough Swilly. Whilst the third edition of the Ordnance Survey 6-inch map recorded two stones at this location, only one remains visible today; the second stone has vanished without trace, leaving no evidence of its former presence.

The standing stone represents one of countless prehistoric monuments scattered across the Donegal countryside, though its exact purpose remains enigmatic. These stones, erected during the Bronze Age or earlier, may have served various functions; territorial markers, ceremonial sites, or astronomical alignments. The deliberate east-west orientation of the Gransha stone suggests intentional placement, possibly relating to solar observations or ritual practices of Ireland's ancient inhabitants.

Today, this silent sentinel continues to mark the landscape as it has for millennia, offering a tangible connection to Donegal's deep prehistory. Its survival, whilst its companion stone has disappeared, serves as a reminder of how fragile our archaeological heritage can be. The stone forms part of the rich tapestry of field monuments documented in the Archaeological Survey of County Donegal, which catalogues the county's human story from the Mesolithic period through to the 17th century.