Iron Oxide beads coated with silica are common herbal compounds and can also easily be synthesized in the laboratory. There are sixteen Iron Oxides, which includes Oxides, hydroxides, and Oxide-hydroxides. These minerals are a result of aqueous reactions under numerous redox and pH conditions. They have the simple composition of Fe, O, and/or OH, however fluctuate in the valency of Iron and standard crystal structure. Some of the crucial Iron Oxides are goethite, akaganeite, lepidocrocite, magnetite, and hematite.