Is the philosopher's stone real

The philosopher's stone is a legend. It was considered to be an alchemical substance that could change any substance to gold and even exude the elixir of life - the one which could make a person immortal. It was sought after by many alchemists in the medieval times. However, the existence of such a stone is a mere legend.

It has been mentioned in various literary and entertainment works. For example, Harry Potter and the Philosopher's Stone, The Alchemist, Fullmetal Alchemist, etc.