In this video series you'll see expert flintknapper John Olsen demonstrate how to take an obsidian stone and turn it into a knife blade. He uses "percussion" flaking to chip off large flakes of rock, and "pressure" flaking to more carefully reduce and sharpen the blade.
Click through to watch this video on expertvillage.com
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.