GREEN CLAY: has strong absorbing and purifying properties, making it the perfect option for people with acne and oily skin. A green clay mask will suck every single blackhead out of your face! It is not the strongest, but it might not be the best option for people with sensitive skin. Is also used in poultices to treat sore muscles, sprains, arthritis, pastes for minor cuts, insect bites, minor burns and stings. This clay is quarry mined from naturally occurring deposits in France and is untreated and dried in the sunlight. Green clay, also known as illite, is an organic material comprised of a host of essential minerals, iron oxides, and decomposed plant material including kelp and seaweed. The color of this clay can range from light green to a greenish gray.