>dozens of elements with a tiny percentage That's really the ask, isn't it? What else is in there that hints of manufacture? Even a few ng of precious metals s

>dozens of elements with a tiny percentage That's really the ask, isn't it? What else is in there that hints of manufacture? Even a few ng of precious metals such as platinum would tell us they were not natural formations. Something extremely rare, say Erbium, would be evidence that these are extra-terrestrial parts.