I'm not saying it's aliens but it's aliens

Sega!

Or it could be meteorite iron.

Didn't Ancient Egypt suffer from meteorite strikes? Not sure how often, but even if there was only one they'd probably take the rare metal for their leader

Isn't there also something like Damascus steel, you know, that awesome steel that everyone forgot how to make? could it be that?

He also had jewelry made out of glass not made from human hands. Turns out it was made millions of years ago when a meteor struck the Sahara. Isn't history great?

just a meteorites metal. if it was Damascus style, it would be obvious based on the inherant patterning.