It is actually quite easy all it is is she'll and stone then it's lime stone
You combine stone and shell.
Lime-stone and fertlizer
you limes then stone
Shell+Stone= Limestone on Doodle God.
Philosopher stone+watet= beer That's in doodle god. I think there should be more
stone+life
its water and lava
Shell + Stone.
You can make gold. Metal+ philosopher's stone
You combine human and stone
Stone+plankton=shell
shell + stone = limestone!