Is there a philosopher's stone that alchemists believed in?

the philosopher's stone (Latin: lapis philosophorum; Greek: chrysopoeia) is a legendary substance, supposedly capable of turning inexpensive metals into gold; it was also sometimes believed to be an elixir of life, useful for rejuvenation and possibly for achieving immortality. For a long time, it was the most sought-after goal in Western alchemy. In the view of spiritual alchemy, making the philosopher's stone would bring enlightenment upon the maker and conclude the Great Work.[1]

Yes there is a philosophers stone, it is carried in the platypuses pouch! by Natalie.O There is no philosophers stone in a platypuse pouch, what also supports my state is that you didnt spell philosopher right. the philosophers stone is from Harry Potter and the PHILOSOPHERS STONE