We all love fire, it protects against beasts and roasts bacon :)
The English (and also German) name of flint - flint - is known from the common name for rifle - flint. Flint was used as a flintstone (the impact of steel with flint creates sparks) in rifles and its task was to ignite the gunpowder that fired the projectile.
There are many videos on the Internet on how to make a fire. It has a hook - it wants the right tools.
The spark that ignites the trunk is a burning piece of metal that you chip off with a flint, for example.
Size 9 cm