The stones are significant in that they get a blue outline (like a normal NPC) when your mouse hovers over them. To activate them all you need to do is click them. The stones are all around the Ferrucio Statue. Below are images to help you find the stones' whereabouts. The first image was the location that the armour was found at in testing, but it is still to be confirmed whether this location is randomized or not. las piedras If you do not find the armor right away, you may be rewarded with items such as Image:Potion Health002.gif Healing Potions.