An example of an igneous rock is granite. Igneous rocks are formed from solidified magma or lava. Granite is a common type of intrusive igneous rock that forms from slow cooling of magma deep beneath the Earth's surface. It is composed mainly of quartz, feldspar, and mica, and is known for its characteristic texture and durability. Granite is widely used as a building material and for decorative purposes such as countertops and monuments.