Gneiss

Gneiss is a type of metamorphic rock formed from existing rocks that undergo high temperature and pressure deep within the Earth. This process causes the minerals to realign and reorganize into distinctive bands or layers, giving gneiss its characteristic striped appearance. It often originates from granite or volcanic rocks. Gneiss is strong and durable, making it useful in construction and decorative applications. Its layered structure provides clues about the Earth's geological history and the intense conditions it experienced during formation.