Exclusive Collection of Crystal Quartz Ball Pendants at Agate Export. Crystal Quartz is the most powerful healing stone thought to be able to work on any condition. It is known as the stone of power and amplifies any energy or intention. It is said to protects against negativity, connecting you to your higher self. It absorbs energies very efficiently and easily, so make sure you clean these stones on a regular basis to keep them happy. Order online today.