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.
W347 Middle Kingdom pick from Armant
A demonstration of ancient Egyptian flint knapping techniques by Marquardt Lund, May 2010
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 Unpublished PhD thesis, Institute of Archaeology UCL.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)