Rav Epstein in his Mekor Baruch 3:19:6 brings a story about him and a maggid. The maggid was looking for a certain sefer which instructs one how to make gold from copper. The Mekor Baruch (who had the sefer) then strikes a deal with the maggid that if he follows the instructions and they indeed work then they will split the profit 70 (maggid) 30 (Rav Epstein). However, after he gave the maggid the instructions the maggid passed away and Rav Epstein felt that he was now able to publicize the instructions. He never tried it but gave his blessing to one who decides to try it.
Has anyone ever practically followed the instructions and tried it? Is this documented anywhere?
The text of the Mekor Baruch:
Instructions loosely translated:
The instructions: Take 9 chicken eggs and place them in a pot, then cover the pot very well, then place it under a garbage heap for 30 days or more, then open each egg up and there will be a worm in each, return everything to another pot and cover it, the worms will then grow and eat everything and then they will begin to eat each other until one big worm remains, then burn this worm in the pot in a manner where you are far away from the bad smell since it is like a deadly poison, afterwards you will be left with ashes and you should take it and store it, after that take pure copper and melt it and place some of the ash on it and then you will have gold.