This UVP, Inc. shortwave/longwave model UVSL-14P Mini UV lamp is a 4-watt model with 254 nm shortwave and 365 nm longwave. 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 light and not fluoresce under longwave.