Scheelite
Silence Lake Mine, British Columbia
There are two different types of UV lights that minerals fluoresce under: shortwave (UVC) and long-wave (UVA). Long-wave (or black light) fluorescence is usually a softer pastel colour whereas shortwave fluorescence is far more vibrant.
Calcite with Zincite and Willemite Inclusions
Franklin, Sterling Hill, Sussex County, New Jersey
The red mineral is calcite and the green mineral is willemite. The zincite is non-fluorescent. Only certain minerals contain substances known as phosphors which, when bombarded with UV radiation, emit radiation of their own. We see this radiation as colours in the visible spectrum and it is known as fluorescence.
Hardystonite with Willemite, Franklinite, and Calcite
Franklin, Sterling Hill, Sussex County, New Jersey
The bright blue-violet mineral is hardystonite, the red mineral is calcite, and the green mineral is willemite. The franklinite is non-fluorescent. Other fluorescent minerals in the collection include liebgite, clinohedrite, scapolite, wollastonite, andersonite, adamite, selenite, halite, and fluorite.
