So stone is extremely rare, almost more rare than oil. In the map generation options the "very big" stone size is as big as iron and coper's "very small" size. In my 2 games with normal settings I was able to find a few pieces of stones, and then in all the chunks scanned by the radars there were maybe 5 stone tiles

I'm not sure if it's a bug or a design choice... Is it supposed to be like that?