+---+---+---+---+---+---+---+
</pre>
:You cannot mine the tile out at C unless you first mine one of the tiles marked with a '.' :*'''You fail to produce anything, the rock is stone hard''': This message can occur when you are starting a new cave. This means that the tile you are tunneling on is a [[ore|ore vein]]. Try to mine the tile below it or too the side of that tunnel.
==Types of ore==