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But yes, those shards are sharp! I still have that "perfect" piece, I'll have to work on it soon. I couldn't get any chips to flake off the "edge", the edge just kept moving closer to the center. I tried knapping that, but it didn't go too well (I didn't try that hard though, just used a nail to chip off pieces. The biggest advantage with obsidian is that it is the sharpest edge there is, it causes very little trauma to tissue, it heals faster, and more importantly, it heals with less scarring, he said. I decided that I wanted to try knapping, so I went looking for more, and found some chert. Obsidian a type of volcanic glass can produce cutting edges many times finer than even the best steel scalpels. On the cellular level an obsidian knife can cut between cells rather than tear the cells as a steel knife will do. I never hunted with any of my handmade points, as it's not legal here.Interesting! I found some flint while visiting my grandparents in AZ, a big enough piece for an arrowhead. Good quality obsidian fractures down to single molecules which can produce a cutting edge 500 times sharper than the sharpest steel scalpel blade ('American Medical News', Nov. What I've read is that it is so sharp, that it is basically cutting between molecules and so leaves very little mark, or scarring. I used to cut my hands all the time and they would heal very quickly and with no scars. TIL Obsidian blades are so sharp (3 nm thickness) that, on a cellular level, obsidian knives will cut between cells rather than tear the cells as steel. These edges can sometimes get much much sharper than your normal steel blades. Are obsidian blades durable Obsidian Blades It is very hard and of course, like most hard things are, it is brittle too. At 30 angstroms a unit of measurement equal to one hundred millionth of a centimeter an obsidian scalpel can rival diamond in the fineness of its edge. Under the microscope, you could see the obsidian scalpel had divided. The chipped edges on blades and arrowheads, like the one pictured, can be very sharp, but what's really unreal is just the plain edge of a big flake knocked off a larger block. In fact as seen under a microscope, an obsidian scalpel will cut cells neatly in half where the finest steel scalpels will look as if they had cut through cells with a chainsaw. Obsidian a type of volcanic glass can produce cutting edges many times finer than even the best steel scalpels. In the Sierra de las Navajas (Razor or Knife mountains translated into English). Flint knapping was a hobby of mine when I was younger.