Andalusite is a mineral that belongs to the aluminosilicate group, primarily composed of aluminum, silicon, and oxygen. It is known for its unique crystal structure, which can form in different shapes, including prismatic and tabular forms. The mineral is typically found in metamorphic rocks and is often associated with high-pressure and high-temperature environments. One of the most distinctive features of andalusite is its pleochroism, which means it can display different colors when viewed from different angles. Common colors include green, brown, and yellow. Andalusite is also used as a gemstone and in various industrial applications, particularly in the production of refractory materials.