Micas are a group of silicate minerals known for their layered structure, which allows them to be easily split into thin sheets. They are commonly found in igneous and metamorphic rocks and are characterized by their shiny appearance and excellent electrical and thermal insulation properties. Micas are often used in various applications, including electronics, cosmetics, and construction materials. The two most common types of mica are muscovite, which is colorless or light-colored, and biotite, which is dark and rich in iron and magnesium. Micas play a significant role in geology and are important indicators of the conditions under which rocks form. Their unique properties make them valuable in both industrial and artistic contexts.