Euxenite is associated with quartz , feldspars , columbite , tantalite , monazite and other rare earth minerals. Euxenite is used as an ore for its rare earth metals and uranium. But it is its gemstone use that is what is odd about this mineral. Euxenite is an interesting and at times attractive mineral. Although most crystals are embedded and do not show good form, some crystals are exceptional and can demonstrate a high luster.
Color is black with a tinge of yellow, brown or green.
Luster is greasy to submetallic. Crystals are opaque. Cleavage is absent. Fracture is conchoidal. Extreme variation caused by variable composition of component metals.