Help me with minecraft?

I'm trying to make a furnace but it says I need regular stone to craft it. When I mine regular stone it turns into cobblestone. I searched up how to make stone and it says to put it in the furnace, but I need stone to make the furnace! Help what do I do. I've been trying to make a furnace all night

Added (1). Oh btw this is on the new version on iPad

You need cobblestone to make a furnace in mincecraft, cobblestone that you put in a furnace won't work. Lol what game r u playing?

Creo que mucho por aprender