Flint
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Flint, occasionally flintstone, is a sedimentary cryptocrystalline form of the mineral quartz, categorized as the variety of chert that occurs in chalk or marly limestone. Historically, flint was wide
A sample of Miorcani flint from the Cenomanian chalky marl layer of the Moldavian Plateau (c. 7.5 cm (3.0 in) wide)
A piece of flint 9–10 cm (3.5–3.9 in) long, weighing 171 grams
Silicified remains of algae and silica pseudomorph after halite in flint. Pebble of Loire near Marcigny, France. Image width: about 5 mm
Pebble beach made up of flint nodules eroded from the nearby chalk cliffs, Cape Arkona, Rügen, northeast Germany
Fire striker
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A fire striker or fire steel is a tool used in fire making, consisting of a piece of steel that can be struck against a flint, chert, or other hard rock in order to generate sparks.
Flint
…These methods remain popular in woodcraft, bushcraft, and amongst people practising traditional fire-starting skills. Flintlocks Assorted reproduction firesteels typical of Roman to Medieval period A later, major use of flint and steel was in the flintlock mechanism, used primarily in flintlock firearms, but…
Assorted reproduction fire steels typical of the ancient and medieval periods
Late 18th-century fire steels from Brittany
Fire striker and flint used in Dalarna, Sweden, in 1916