Rockwood

A new block found spread out in the overworld. It looks like wood type material and has a very high blast resistance. Only can be mined with diamond axe/pickaxe, but will break after collecting one rockwood if the tool was not enchanted. Most blocks that can't be blown up by TNT aren't very decorative and wouldn't want to be used in common builds, so rockwood would be group for building bunkers or castles in creative mode that are almost industructible.