A Vogel Green Clay - Used for clay mask, green clay is ideal for oily and problem skin. A. Vogel clays are extracted from ancient sea floor deposits and contain natural minerals and trace elements. They are 100% natural, without additives or preservatives. All A.Vogel clays are colloidal and of surfine quality. The colloidal property acts as a cleansing agent and helps to remove harmful substances from the body. A. Vogel Green Clay can be used as a beauty mask for oily and problem skin, compresses, mud baths, body wraps, and poultices.