Fluorescence can be a useful tool in examining geological specimens. While some minerals from particular locations are quite strongly fluorescent, even the weaker fluorescence of other specimens can aid in their detection and identification. The longwave ultraviolet and royal blue excitation wavelength sets of the Stereo Microscope Fluorescence Adapter are particularly useful for examining samples. NIGHTSEA collaborated with a professional geologist in an investigation of the fluorescence of minerals under blue light excitation.