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Isn't that the equivalent of unobtainium in steel?

Plus the unicorn has a horn, not a tooth growing out of its head. Horn stinks when you grind it to shape, or when it gets wet.

Theseus, you...

+1 on pixelfixed's picture. One more from a cut of mammoth ivory would complete the set. The angle of the Schreger lines is/are different for mammoth.

Here's a good resource: All About...