Question

what is Philosopher's Stone?​

Answer 1

Answer:

a mythical substance supposed to change any metal into gold or silver and, according to some, to cure all diseases and prolong life indefinitely. Its discovery was the supreme object of alchemy.

Answer 2

Answer:

The philosopher's stone, more properly philosophers' stone or stone of the philosophers, is a mythical alchemical substance capable of turning base metals such as mercury into gold or silver.