This is the only colloid Crystal sold anywhere. It is hand-mined and emits the most powerful healing frequency. 4G & 5G de-charge our body and teeth. That leads to a long list of health challenges. EMF also disrupts Sleep. This Grounding Bag will allow you to have the best sleep ever. It heals you and repels EMF. It is the most incredible product. They are sold in doctors clinics all throughout California to Colorado. For the people that can feel Energy, you will not want to put this Grounding Bag down.