the.com/obsidian
volcanic glass that snapped into blades sharper than the surgeon's steel beside it
edgeSplits thinner than any metal scalpel, down to single molecules
originLava cooled so fast crystals never had time to form
surgical useStill used in some scalpels for cleaner healing
aztec mirrorsPolished for scrying long before silvered glass existed
weaknessBrittle as it is sharp, shatters on hard impact