https://en.wikipedia.org/wiki/Knapping
Knapping: Knapping 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.
Here's an article about it:
How To Master Flint Knapping For Survival And Preparedness
https://www.skilledsurvival.com/flint-knapping/#more-6304
If you’re into survival, bushcraft, and preparedness, owning an arsenal of bladed survival tools makes sense. And if you want to be able to make your own blades from nature, you need to learn the art of flint knapping.
So today we’re going to go over the following flint knapping topics in detail:
Brief Flint Knapping History
Best Stones And Materials For Knapping
Basics On How Knapping Works
The Different Stone Tools You Can Make
Different Flint Knapping Techniques
Tools You Need To Start Flint Knapping
Flint Knapping Safety Tips
Flint Knapping Instruction Options
Stone Knapping For Survivalists ---CONTINUED---