In Harry's pocket. You click the mirror and he winks and pulls the stone out.
you need to complete all the chapter and the chapter in which harry obtained the philosophers stone in the same chapter you also can. i think so at least. if my answer is wrong. i am sorry then.
alchemists only believed that their was a philosophers' stone
Doodle God 2 Philosophers stone + sand (sand=stone+water) (philosophers stone=demi god+quick silver)
Yes, you can find many things. For a guide per chapter see the Pottermore Wiki.
Philosophy+stone
Philosophers stone plus metal equals gold. Wizard plus energy equals philosophers stone.
demigod+quicksilver=philosophers stone
Alchemists were the ones looking for the philosopher's stone.
Elixir of life.
he was 10
You can make gold. Metal+ philosopher's stone
Demigod + Quick Silver = philosophers stone