![Making an obsidian knife: The edge of an obsidian fracture can be as little as one atom thick, meaning it can be many times sharper than the finest steel scalpel (not my Making an obsidian knife: The edge of an obsidian fracture can be as little as one atom thick, meaning it can be many times sharper than the finest steel scalpel (not my](https://external-preview.redd.it/9tGp1j6es60zmHgxPNUHdO-8oO958ip_1nwBPClsWiU.png?format=pjpg&auto=webp&s=28c825de3fe26fda2343fa27f25a8beafbc91fab)
Making an obsidian knife: The edge of an obsidian fracture can be as little as one atom thick, meaning it can be many times sharper than the finest steel scalpel (not my
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solid state physics - What happens if a metal wire that was one-atom in thickness was pulled across a finger? - Physics Stack Exchange
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