In addition to the ambiguity of the excitation
wavelength of UV lamps, the interpretation of fluorescence
color can be difficult as well. Due to the
contribution of subordinate peaks and the length of
the tail of a fluorescing band, diamonds with fluorescence
emissions of similar origin can yield fluorescence
colors that are quite different. Figure 16
shows the effect of a subordinate peak in the diamond
fluorescence spectra, and figure 17 shows the
effect of a long spectral tail. As demonstrated by