"This doesn't seem useful."
|Source||Clay Pit |
When mining with a pickaxe that is Enchanted with a Scroll of Destructive Testing, each Stone you would receive will instead be destroyed and you will be given an extra 5 Mining Exp. This can be quite useful when trying to gain Mining Exp as a pick with six Destructive Testing enchantment can make Clay Pit have the highest Exp gain.
Otherwise, there is no other known use for Stone.