We hand-mine our Tesla crystals. They have been compressed with water from an underground water source forever. They have moisture content in them, along with magnetic properties that help repel and ground EMF. They are not wet to the touch but will dry out when unsealed. Because of the moisture and magnetic properties, how we mine them, and how they are deployed, they carry a stronger frequency to repel EMF than Shungite, Amathyst, or all other crystals or man-made products. Dr. Barre Lando's Wave Form Test showed our Grounding Bags, clinically, passively treating /corrected up to 91% markers off from EMF. He had never seen this result and had tested multiple highly touted products. The Grounding Bags are simply remarkable!