A mineral deposit caused by rock erosion. It has very small grains and contains silicates and aluminium. In addition to well-known absorbent properties, clay also performs a remineralising action, thanks to the presence of magnesium, calcium, sodium, potassium, iron and aluminium, which are transferred to the cells of the body by osmosis. Clay also has antioxidant properties, because it is able to bind to the free radicals responsible for aging, and performs a healing and disinfectant action on cuts and wounds, aiding blood coagulation and skin regeneration.