This circular structure, measuring just over two metres across and standing three quarters of a metre high, might easily be overlooked if not for the remarkable cross-inscribed stone that crowns it. The slab, though now broken in two pieces, once stood nearly two metres tall atop the cairn; its upper portion now rests beside the base whilst the lower section remains in place.

The decoration on this ancient monument faces eastward and displays intricate carved symbolism that speaks to early Christian influence in the region. A quartered circle contains a Greek cross at its centre, with the cross's central line extending downward beyond the circle before expanding into a circular groove bordered by an outer band. This type of ornamentation, combining both circular and cruciform elements, represents a distinctive style of early medieval Irish stone carving that blended Christian imagery with older artistic traditions.

The cairn's location in Glencolumbkille, known locally as An Gaineamh Agus An Curraoin, places it within one of Ireland's most historically rich valleys. This area has long been associated with St. Columba (Colmcille), who is said to have established a monastery here in the 6th century. The presence of this cross-inscribed monument adds another layer to the valley's complex archaeological landscape, serving as a tangible reminder of the religious and cultural practices that shaped this corner of Donegal over many centuries.