Golden Ratio of Phi.
John Feliks has written on Phi in the Acheulean: "However, as demonstrated in Figures 2.1 and 2.2, phi does not end as a line. The phi “line” represents only its one-dimensional aspect. Phi was employed in the handaxe technologies of all Acheulian and Mousterian peoples as a “two-dimensional” ratio. This fact makes phi the ratio equally representing the cognition of all post-habilis early human species from ergaster and erectus through heidelbergensis and Neanderthal (its use by modern Homo sapiens is, of course, well known). Phi can also be represented in three and four dimensions including time, and if one is open to such as string theory, a great deal more dimensions useful in cognitive archaeology, as well."
-John Feliks, PHI IN THE ACHEULIAN: LOWER PALAEOLITHIC INTUITION AND THE NATURAL ORIGINS OF ANALOGY
West Tofts, U.K. handaxe centered on a fossil demonstrates the long tradition of centering on or featuring natural stone features in man made objects.