More on gold

Perhaps, but you won’t find a nugget of brass lying in a riverbed.

Actually, if you read above, Blake made a pretty good case about why it’s nowhere near as simple as that. Plenty of things that could or do make decent jewelry - like the aforementioned quartz - are not useful as currency for plenty of other reasons.

It can be worth trying to understand things, even if they’re complicated.

Gold is probably the first metal discovered; one of the few found in it’s pure state.