👉 Pyxidium is a type of mineral that is found in various rocks and minerals, but it has not been officially defined by any scientific organization. It is often associated with the rock formation process and the interaction between different types of minerals. However, some people may associate pyxidium with the idea of a type of rare earth element, which is a group of 18 elements that are known for their unique properties and uses in various industries. The term "pyxidium"