Whizbang Dustyboots
Gnometown Hero
But you've (again) failed to answer the obvious question at the heart of the issue:
How do you define "pure" electrum, as called for in the adventure's plot?
There is no such thing.

But you've (again) failed to answer the obvious question at the heart of the issue:
How do you define "pure" electrum, as called for in the adventure's plot?
There is no such thing.
I think authors and readers don't always agree on how rigorous the "science" of a fantasy world should be. Almost none of any ttrpg world makes any sense in terms of physics alone, to say nothing of biology or even chemistry.And we all know that "a wizard did it" is often merely an excuse for authorial laziness.
If you are having giants stomping around -- which simply doesn't make any sense, looking as humanoid as they do in the art -- the Goodman Games loose setting of Aerth already doesn't make any sense from a scientific standpoint. I don't find it to be a problem if they handwave the idea of electrum being "pure" in that environment.