This UVP, Inc. shortwave model UVG-4 Mini UV lamp is a 4-watt model with 254 nm shortwave. It is an excellent lamp for office or quick field inspection. Lamp is lightweight and small enough to fit into a pocket. A nylon strap is attached for easy handling. Operates on four AA batteries (not included).
GEMSTONE and MINERAL INSPECTION
UV Light can react with the chemicals of a mineral specimen and cause it to glow, called fluorescence. Color and intensity of the fluorescence can identifty many materials. Some minerals and gemstones will fluoresce under shortwave UV ligh and not fluoresce under longwave.