Flint was used in Egypt up until the Graeco-Roman Period (c.300 BC). It was used for everyday items such as piercing and cutting tools and was also important in the religious life of the ancient Egyptians.
Graves-Brown, C. 2007. The Ideological Significance of Flint in Dynastic Egypt. Unpublished PhD thesis, Institute of Archaeology UCL. (volume 2 includes a simple typology)