The stone at Machaire Loiscthe, now broken into two pieces, originally stood at 1.69 metres high; a modest but significant prehistoric monument measuring 0.7 metres wide and just 15 centimetres thick. Like many of Ireland's standing stones, its original purpose remains a mystery, though these monuments are generally believed to have served various functions from territorial markers to astronomical alignments, or perhaps as commemorative monuments for Bronze Age communities.

The stone's current state tells a story of both neglect and renewal. Having toppled at some point in its long history and split into two fragments, it lay forgotten in the landscape until relatively recently. According to records compiled by archaeologist Caimin O'Brien in 2010, efforts were underway to re-erect this ancient marker, returning it to its original standing position where it can once again serve as a tangible link to Donegal's prehistoric past.

This particular monument forms part of a broader archaeological landscape across the Fanad Peninsula, where numerous prehistoric sites dot the countryside. The location itself, positioned strategically between two significant bays, suggests the stone may have marked an important route or boundary in ancient times. For those interested in Ireland's prehistoric heritage, the Machaire Loiscthe stone represents one of thousands of such monuments scattered across the country; each one a silent witness to the beliefs, practices, and daily lives of our distant ancestors.