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When a distribution map of Neolithic stone axes in Ireland was published in ANTIQUITY (Grogan & Cooney 1990), the new Irish Stone Axe Project (ISAP) was mentioned. Stone axes, it turns out, are unusually common in Ireland. Here Project progress is outlined, with special attention being given to those axes identified as having been moved across the Irish Sea.

There has been a long but sporadic history of research on stone axes in Ireland, leading to the formation of the Irish Stone Axe Project (ISAP) in 1990. The purpose of this paper is to outline the research strategy of the project and to indicate the petrological techniques that are being applied in parallel with archaeological and archival studies to classify and identify potential sources for Irish stone axes. These include macroscopic studies, transmitted and reflected light microscopy on polished thin sections and X‐ray fluorescence analyses. The results of the macroscopic examination of 15916 axes indicate that one rock type, porcellanite, was the dominant source, but that a wide range of other lithologies was also exploited. Several avenues for more detailed research are highlighted. A case study of gabbro axes demonstrates the value of this systematic approach to stone axe studies, and the results of this study suggest that some of these axes are petrographically consistent with British Group I, presumed to originate from sources in Cornwall, south‐west England.

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