Wiktionary
potable gold
n. 1 (context historical English) A theoretical substance which would confer eternal life to the drinker. 2 (context historical English) A preparation consisting of gold particles in oil and alcohol.
Usage examples of "potable gold".
It is the Medicine of Metals, the Stone of the Wise, the Potable Gold, the Elixir of Life that is consumed therein.
Tobacco, divine, rare, superexcellent tobacco, which goes far beyond all their panaceas, potable gold, and philosopher's stones, a sovereign remedy to all diseases.