The strongest electromagnetic earth wave absorption stone and anchor stone. Stone of electro-sensitive Black Tourmaline is a very powerful stone of protection and anchoring. It absorbs harmful tellurism, electric waves, neutralizes negative energies and cleanses the aura. Black tourmaline natural stone has the property of being one of the most powerful stones in absorbing negative energies from places and people and dissolving them at ground level. It reacts like a grounding plug. It is the main and master stone in lithotherapy. For each lithotherapy session, black tourmaline is necessary in order to anchor the patient to the ground, to also protect him. It causes deep rooting in the earth. This natural stone will be mainly used on the root chakra or in contact with the soles of the feet. This stone has electrical properties, it has also been the subject of numerous experiments, traces of which can be found as early as the 18th century. Black tourmaline protects both from static electricity phenomena, radio waves and cosmo telluric disturbances, geopathogenic nodes, crossings of underground flows ... As such, it is used in geobiology to protect and purify places of life ( habitats, shops, businesses ...) This natural stone has its place in a passageway either at home or at the office. Its shield and sponge effect makes it possible to maintain a certain neutrality, re-harmonize and raise the vibratory rate of a room. Put on your box on your electric meter, ready for a computer or ready for a hob, black tourmaline natural stone absorbs electromagnetic, electro-static electric waves and brings back to the earth what absorbs it. It is a stone which worn on oneself allows to increase its vibratory rate, to protect from the surrounding electricity and electrosensitive people.