Augite is a common mineral found in many igneous rocks, particularly in basalt and gabbro. It belongs to the pyroxene group and is characterized by its dark color, typically black or dark green, and its prismatic crystal structure. Augite is composed mainly of calcium, magnesium, and iron, which contribute to its distinctive properties. This mineral plays a significant role in geology, helping scientists understand the formation and evolution of volcanic and plutonic rocks. Augite can also be used to identify the conditions under which a rock was formed, making it an important tool in the study of petrology.