Do you have a spare fusion reactor? 
They can be modded to transmute mercury into gold as well :)

Regular (fission) nuclear reactors won't work, unless you happen to have a fast neutron-producing "breeder" one.

Please share photos of your project when finished!

Do you have a spare fusion reactor? 
They can be modded to transmute mercury into gold as well :)

Regular (fission) nuclear reactors won't work, unless you happen to have a fast neutron-producing "breeder" one.

Please share photos of your project when finished!
https://www.marathonfusion.com/alchemy.pdf