03-09-2018, 05:55 PM
![[Image: 24m8etx.jpg]](http://i65.tinypic.com/24m8etx.jpg)
This picture shows the differance between todays steel edges and a obsidian edge.
There is perhaps better pictures on obsidian edges, if you find any, please post them here!
Obsidian edges are "natural" edges and 1 molecyle thick, the sharpest edge in the world ever. From a piece och obsidian you can cnock (?) a piece from its side - and you will (after som training) get an edge 1 molecyle thick. If you try, please be safe, use protection on your body and for your eyes.
These edges are terrible sharp - and brittle. So, stone age people started to grind them for around 6000 years ago so that they get more material in and behind the edge = their edges get duller - but stronger.
Thomas