In reply to balmybaldwin:
> Makes me wonder if there's caves of the stuff in the Incan/Aztec region... Wiki suggest its a possibility, but couldn't find anything about where natural occurrences have been found
Mmmm.
I didn't think to look but yes,
"Bismuth is typically obtained as a by-product in refining lead, copper, tin, silver, and gold ores found in Bolivia, Peru, Japan, Mexico, and Canada"