Celestite, also known as Colestine (Srs04) has a hardness of 3-3.5 on the Mohs Scale and forms according to othorhombic crystal structure. It comes in white, yellow, orange and brown, but the most prized colour is blue.
Geode is the technical name fro a crystal cave. Caves are recognised to generate energy rather than store or collect energy and can be used to cleans and charge other crystals. They are also used within the art of Feng Shui to help balance and harmonize the energy within a room or building.