Talk:Semblance/@comment-70.27.60.223-20151031212444/@comment-4010415-20151102103811

Some surgeons use obsidian scalpels, but they're incredibly expensive, so most default to steel.

The thing is, not only does obsidian cut through flesh much more easily, it also reduces recovery time and scarring, due to the cut being completely clean. Even the finest steel scalpel still has serrations on a microscopic level, thus leading to it tearing the flesh at said level. It may be miniscule, but it makes a difference in how much scar tissue will form and how long it will take to recover.