👉 Uraniites are a group of rare and extremely rare minerals found in the Earth's crust, primarily within the Earth's outer core. These minerals are not typically mined or extracted, but rather they are discovered by chance through geological processes such as volcanic activity. The name "uranites" comes from the Greek word for "uranium," which is a chemical element with the symbol U and atomic number 92. Uranites were first described in the 1870s, when the