Gallium is named from the Latin Gallia, France and was recognized as a distinct element in 1875. Gallium is often found as a trace element in diaspore, sphalerite, germanite, bauxite and coal. Ultra pure gallium has a beautiful, silvery appearance and is one of the few metals that can be liquid at near room temperature. This makes its use possible in high temperature thermometers. Gallium wets glass or porcelain and forms a brilliant mirror when it is painted on glass. It is also used for doping semiconductors and producing solid state devices such as transistors.