Tellurites are chemical compounds that contain the element tellurium, which is a metalloid. They typically form when tellurium combines with metals, resulting in various minerals. These compounds can be found in nature, often in association with other minerals, and are important in the study of geology and mineralogy. In terms of their properties, tellurites can exhibit different colors and crystal structures, depending on their composition. They are often studied for their potential applications in electronics and materials science, as well as their role in the natural processes of geochemical cycles.