This might be what they were referring to: https://en.wikipedia.org/wiki/Synthesis_of_precious_metals#Gold https://en.wikipedia.org/wiki/Synthesis_of_precious_m

This might be what they were referring to: https://en.wikipedia.org/wiki/Synthesis_of_precious_metals#Gold https://en.wikipedia.org/wiki/Synthesis_of_precious_metals#G... "Gold can currently be manufactured in a nuclear reactor by the irradiation of either platinum or mercury" Not much in the way of details, unfortunately. The sources might be a good place to look for more.