In Alchemy Classic, to create stromatolites, combine the elements of stone and life. First, ensure you have both elements in your inventory, then use the alchemy interface to merge them. This process reflects the natural formation of stromatolites, which are layered sedimentary structures formed by microbial activity. Once successfully combined, you will have created stromatolites in the game.
You cant make alchemy classic, its a game! Though you can download it and play it!
in alchemy classic its 2 bacteria but it might be different in the original (assuming your playing alchemy classic)
lplolol
caoutchouc
freezer
4fire + metals
Sand\Earth
Earth + Grass
Earth and Plankton
Trees+Flower
2*bacteria
Swamp and sand