That alone would make it worth noting, but what gives the Brackloon stone its particular character is a carved Latin cross, with expanded terminals at the ends of its arms, cut into the north face roughly a metre and a quarter from the ground. The cross is a later addition to a much older object, a quiet act of Christianisation layered onto prehistoric stonework, the kind of superimposition that happened across Ireland as the early church worked to absorb or reframe the landscape's older meanings.

The stone does not stand alone. Grouped close by are a cup-marked stone, its surface dimpled with small circular hollows whose exact purpose remains debated among archaeologists, and what appears to be a cist, a stone-lined burial box of the kind associated with Bronze Age interment. Together the three form a small prehistoric cluster on a level summit in otherwise gently rolling pastureland, positioned to look out over the valley below. The site was documented as part of the Dingle Peninsula archaeological survey published by J. Cuppage in 1986 under the title Corca Dhuibhne, a survey that systematically catalogued the extraordinary density of ancient remains on the peninsula.

The grouping at Brackloon is modest in scale but unusually legible as a layered site. The standing stone's alignment runs east to west, a direction that recurs across prehistoric monuments in Ireland and may reflect solar or ritual considerations, though no single explanation has been settled upon. The cross carved into its face speaks to a later moment when the stone's obvious presence in the landscape made it a useful surface for a new kind of marking.