The basic chemical formula for bauxite is AlOH3. Bauxite is a heterogeneous material with a composition fundamentally consisting of aluminum hydroxide, but the compound may contain other substances, including iron oxide and silica.
Bauxite frequently occurs in limestone and clay deposits. This igneous and sedimentary compound is classified as an ore rather than a mineral. It is not valued as a gemstone and has a dull luster and brittle quality; the coloration of bauxite ranges from gray and beige to white, yellow.and pink. Nonetheless, bauxite is important as a significant aluminum source. A town in Arkansas is even named for bauxite..