A to Z Minerals- A Complete Organic Fertilizer A Source of Minerals & Trace Elements Azomite is the name of a special rock in Utah. Early this century geological prospector Rollin Anderson found deposits of montmorillonite clay in a valley south of Salt Lake City. U.S. Bureau of Mines analysis showed the clay is similar to Chilean/Peruvian caliche rocks from which much of the world's nitrate was mined. Anderson ground montmorillonite as fine as possible, then put it in his garden. Results were amazing and nearly immediate. Minerals in Azomite are necessary to optimal metabolism in living things. Ground to dust, minerals are small enough to pass through cell walls of organisms.