The rhyolite is one kind of lava, rich in silica, which forms in the magma of the volcanoes. It is an abrasive mineral so it exfoliates while it tonifies. It is the perfect mineral to regenerate the skin and soften the epidermis without affecting the hydrolipidic layer. The formula is complemented by black, volcanic clay, which is very rich in organic matter. It’s an excellent rejuvenator, since it improves the peripheral microcirculation, enhancing the cellular renovation. Perfect for mixed skin.