Why was flint especially useful for making Stone Age tools?

Flint was the preferred material for Stone Age toolmakers primarily because it is homogeneous and isotropic, meaning it possesses uniform properties in all directions. As a hard, brittle form of silica, it lacks cleavage planes and instead exhibits a conchoidal, or shell-like, fracture. This allows the stone to be shaped predictably through percussion or pressure flaking, consistently producing extremely sharp cutting edges when flakes are detached.12

Because of these physical characteristics, flint was easier to chip into desired forms than many other types of rock. Its durability—being harder than most steels—made it an ideal material for creating effective tools and weapons. Due to its superior workability and performance, flint became a highly valued commodity, often serving as an object of trade and a primary resource for early human technological development.231