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Actually it's not sterile, just bacteria doesn't like it too much and it's fairly inert so it's OK to be stuck inside a living organism.
However it's way too soft to make a cutting instrument, not...

No way! There have always been razors made with more than simple shaving in mind:
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There was a razor somewhere for $40,000.00, so I guess that would be the Salvatore Ferragamo of razors.
If you want exclusive materials, my pick for the blade would be wootz and for handle...