thumb|"Hammerstone" eolith, recognized to be of natural origin by Boule in 1905 An eolith (from Ancient Greek ἠώς (ēṓs), meaning "dawn", and λίθος (líthos), meaning "stone") is a flint nodule that appears to have been crudely knapped. Eoliths were once thought to have been artifacts, the earliest stone tools, but are now believed to be geofacts (stone fragments produced by fully natural geological processes such as glaciation).