Tags: Chemical Substance, Mineral.
Rutile is a mineral composed primarily of titanium dioxide TiO2.Rutile is the most common natural form of TiO2. Two rarer polymorphs of TiO2 are known:Anatase (sometimes known by the obsolete name octahedrite) a tetragonal mineral of pseudo-octahedral habitBrookite an orthorhombic mineralRutile has among the highest refractive indices at visible wavelengths of any known crystal and also exhibits a particularly large birefringence and high dispersion.
