All of the hydrogen was created at the initial cooling of the big bang. In this case what I mean by primordial, is that it was never part of a larger composite object like a star.
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If that hydrogen was previously incorporated in a star, I think it’s fair to call it stardust. That’s very likely, since our solar system would have formed from a relatively dense cloud of the remnants of earlier stars, with just a smidge of primordial hydrogen mixed in.
You’re describing circular polarization. It’s not the only way.