A new framework for the consideration of Neolithic axes is proposed, consisting of six rock classes defined by rock composition and working properties. The use of rock from these classes varied systematically in Britain, and reflected local geology. Flint exploitation, whose significance in the production of axes has been grossly underestimated, is considered in especial detail (with a full survey of flint mines and quarries). A major study of axe morphology is reported on. The paper includes gazetteers of caches of stone axes (many previously unpublished) and of axes found in burials.