Schist is a type of metamorphic rock characterized by its foliated texture, which means it has layers or bands of minerals. It forms under high pressure and temperature conditions, typically from the alteration of shale or other sedimentary rocks. The minerals in schist, such as mica, quartz, and feldspar, are often visible to the naked eye, giving it a shiny appearance. The formation of schist occurs deep within the Earth's crust, where tectonic forces cause rocks to undergo metamorphism. This process can create distinct mineral alignments, resulting in a rock that can be split into thin sheets. Schist is commonly used in construction and as a decorative stone due to its unique texture and appearance.