Archaeological Pitchstone in Northern Britain

Today the number of pitchstone-bearing sites in northern Britain has multiplied several times and approximately 20,300 worked pieces from c. 350 sites have been found; pitchstone artefacts have been reported from practically all parts of Scotland (apart from Shetland), as well as from northern England, Northern Ireland, and the Isle of Man. Most of the new locations represent excavated material with well-defined find contexts.