Tellurite is a mineral composed primarily of bismuth and tellurium, with the chemical formula Bi2Te3. It typically appears as a metallic gray or silver-colored solid and is often found in hydrothermal veins. Tellurite is known for its unique crystal structure, which can form prismatic or tabular crystals. This mineral is of interest in various fields, including geology and materials science. It can be associated with other minerals such as gold and silver, and its properties make it a subject of study for potential applications in electronics and energy storage.