Knapping
Knapping ( NAP-ing) is the shaping of flint, chert, obsidian, or other conchoidal fracturing stone through the process of lithic reduction to manufacture stone tools, strikers for flintlock firearms, or to produce flat-faced stones for building or facing walls, and flushwork decoration. The term “knap”(1500s) was originally onomatopoeic and meant “strike with a sharp sound” (with the k- pronounced) and later shifted to mean “to shape or work by sharp strikes”.