Rhassoul Clay (Moroccan Lava Clay): This clay comes from the Atlas Mountains of Morocco, the only known source in the world. It is a totally natural product that is used today as it was hundreds of years ago. Rhassoul clay has the ability to absorb oil and impurities from both the skin and the hair. Rhassoul contains higher percentages of silica and magnesium along with potassium and calcium, than other clays.