DEFINITION: Granite is a type of igneous rock that is composed of quartz, feldspar, and other minerals such as mica and amphiboles. It is one of the most common and popular materials used for construction, flooring, and countertops. Granite is characterized by its unique and intricate patterns of interlocking crystals. It is a hard, durable, and resistant material, with excellent heat resistance, scratch resistance, and low porosity.