040114 dungeon-keeper resources stone
Stone accumulates automatically in your claimed Stone Quarries. To collect the accumulated stone, just touch the quarry. Arguably, of the four collectible resources, Stone is the second most valuable due to it's heavy use in upgrading walls.

The amount of stone you can store at a given time is limited by your Warehouses, Stone Quarries and Dungeon Heart.

The maximum amount of stone a dungeon can hold is 7,201,500:

You can also earn stone by Raiding, and is dependent on how much damage you perform, and the level of your opponent.

There are several ways to spend stone: