Onondaga limestone layer, Buffalo, NY. (3.8 cm wide)]]

Flint (or even flintstone) occurs as stiff, sedimentary cryptocrystalline silicate rock with the glassy appearance. Flint is normally dark-grey, blue, black, or even burnt umber around colour. It occurs primarily when nodules and people within chalks and limestones.

The nature and severity of chert, this material is one of a virtually all ordinarily utilized materials for the manufacture of stone tools during a Stone Age, as it splits into thinly, acutely sliver known as flakes or even blades (based in the shape) whenever struck by an additional stiff object (like the hammerstone made of another lesson). It remained an essential mineral resource for making fire, including the flintlocks on early firearms, until the close of the 18th century. It was too utilized extensively from either a 13th century until the present day as a lesson for building stone bulwarks, especially around England.

Within Europe, some of the better toolmaking flint has come from either Belgium (Obourg, flint mines of Spiennes), the coastal chalks of the English Channel, the Paris Basin, the Sennonian deposits of Rügen and the Jurassic deposits of the Kraków-area around Poland. Flint mining is attested since a Palaeolithic, but became other park since a Neolithic (Michelsberg culture, Funnelbeaker culture).

Pebble beach made up of flint nodules eroded out of the nearby chalk cliffs, Cape Arkona, Rügen