Allanite is a mineral that belongs to the epidote group. It is a complex sorosilicate mineral that typically contains rare earth elements such as cerium, yttrium, and lanthanum. The mineral occurs in granite, syenites, and other felsic igneous rocks, as well as in certain metamorphic rocks, such as skarns and gneisses. Some synonyms for allanite are orthite, cerianite, lanthanocerite, and gadolinite. Allanite is a valuable source of rare earth elements, and its practical applications include its use in the production of electrical components, ceramics, and glass. While it may not be the most well-known mineral, allanite plays an important role in industries around the world.