Green Clay Powder is a type of mineral clay valued for its highly absorbent properties. Illite is a bio-mineral, composed of both decomposed plant material and trace minerals such as calcium, aluminum, magnesium, silica, phosphorous, copper and zinc.

Alternative medicine practitioners believe this composition makes French green clay particularly beneficial as a therapeutic treatment for a variety of health concerns, and it is one of the most popular clays used in Pelotherap.