This is a bullaun stone, a type of ancient rock feature found across Ireland, characterised by one or more hollows ground or worn into the parent stone. Their precise origins and purposes remain debated; some are thought to have served practical functions such as grinding, while others have accumulated folk associations with healing, cursing, or sacred ritual over the centuries.

The Bahana example is a substantial piece of fine-grained granite, measuring approximately 94 centimetres north to south, 64 centimetres east to west, and standing around 55 centimetres high. The bullaun itself is circular, between 31 and 33 centimetres in diameter and 15 centimetres deep. What makes the stone slightly puzzling is a detail noted in the record: the western portion of the block appears to have been removed at some point, suggesting the stone may once have been larger, or that it was later modified or disturbed. Whether this happened through quarrying, agricultural clearance, or some other intervention is not recorded. The site was noted by Price and subsequently referenced by Corlett and Weaver in their 2002 survey of Irish antiquities.