The late Pleistocene period witnessed significant shifts in human lifestyle and behaviour across various regions in the Old World, as indicated by prehistoric archaeological evidence. These shifts reflect a transition from hunting to a greater emphasis on activities related to gathering plants. Archaeological findings demonstrate the utilization of plants in diverse forms, including the emergence of Bedrock Ground Stone (BGS) at prehistoric sites. In the realm of archaeological research, these remains are deemed crucial man-made artefacts, shedding light on essential aspects such as nutrition, culture, vegetation, food processing, and the presence of medicinal and toxic substances within ancient human societies. Given the existing research gap and the paramount significance of these artefacts in archaeological and anthropological studies, the Diyarmehr Institute for Paleolithic Research, for the first time in Iran, has committed to undertaking comprehensive and scientific investigations of the BGS in the Nawadrwn valley in the Kermanshah region. Owing to its geographical positioning and environmental abundance, the west-central Zagros range has historically attracted and served as a conducive habitat for diverse human groups across various epochs. This study represents a multi-disciplinary research endeavour focused on 24 bedrock groundstones (BGS) discovered in the Prehistoric Bawa Yawan rockshelters within Nawdarwan valley. Detailed morphological and geochemical analyses have unveiled their multifaceted utility, encompassing purposes such as herbal processing and extraction, and their use in three instances as stone lamps.