Watch a waterjet slice a perfect obsidian cube and some batarangs

The guys from Waterjet Channel took a request from a Minecraft fan who wanted to see them cut an obsidian cube, even supplying the obsidian. They also made some super-thin batarangs that could almost be used as sunglass lenses. Read the rest

Watch how to turn obsidian into a razor-sharp blade

Andy from How To Make Everything went out in the Utah desert, gathered up volcanic glass, then through trial and error learned how to make an Aztec-style edge weapon.

The episode includes an interesting history lesson from anthropologist Gilbert Tostevin at University of Minnesota, who shows Andy how Aztecs used a haft embedded with smaller obsidian pieces to make formidable weapons.

Turning Volcanic Rock into a Blade that's Sharper than Steel (YouTube / How To Make Everything) Read the rest