[calex59]

Obsidian takes, and holds a better edge than either copper, or bronze,

Better than some steels also. Some surgeons use obsidian blades on their scalpels because they are sharper than steel blades. Fact.

[infowarrior]

Better than some steels also. Some surgeons use obsidian blades on their scalpels because they are sharper than steel blades. Fact.

I was unaware of that, but don't find it surprising at all...

the infowarrior