The Resurrection Stone is one of the three Deathly Hallows, and it is a magical object that can summon the spirits of those who have passed away. You need to hold the stone and turn it three times in your hand to use it. Once you do this, the spirits will appear translucent, and you can communicate with them or give them instructions. However, it's important to remember that those who return to life through the stone do not belong in the world of the living, and it's essential to allow them to return to their resting place.