Returning your crystals to the earth can refill them with energy, renewing them. Dig a hole in the earth and place a plate in the soil. Cover the plate slightly, then place the stones on top. Bury the stones and mark the place on the surface where you know where to dig. A week later, carefully remove the topsoil and remove the stones. If you reach the plate, you know you have gone too far and you may have dug up the stone.