Rutile is a mineral composed primarily of titanium dioxide (TiO2). It is one of the most abundant minerals on Earth and is found in many different types of rock, including igneous, metamorphic, and sedimentary rocks. Rutile is commonly found as tiny, reddish-brown or black crystals within other minerals or as an inclusion in rocks. It is also found in large deposits in certain beach sands, where it is often extracted for use as a source of titanium.
has several important properties that make it useful in a variety of applications. One of its most significant properties is its high refractive index, which is a measure of how much a material can bend light. Rutile's refractive index is higher than that of most other minerals, including diamond, which makes it valuable in the production of certain types of optics, such as lenses and prisms.