Quartz is not an igneous rock. It is actually a mineral that can be found in various types of rocks, including igneous, sedimentary, and metamorphic rocks. Quartz is one of the most common minerals on Earth and is composed of silicon and oxygen atoms.
In igneous rocks, quartz forms as magma cools and crystallizes. It is often found in granite, which is a common type of igneous rock. However, quartz itself is not classified as an igneous rock but rather as a mineral that can be present in igneous rocks.
Quartz is known for its hardness and resistance to weathering, which makes it a durable mineral. It is often used in jewelry, electronics, and as a component in various industrial applications.