Some reasons for such discrepancies are detailed in
the Discussion section. The short-wave fluorescence
was weaker for all the natural-color diamonds,
and some diamonds exhibited no apparent
luminescence to either UV wavelength. While no
significant inhomogeneity or turbidity in the fluorescence
colors was noted, we did not look specifically
for such characteristics. A few samples
showed a different fluorescence color when examined
by the DiamondView, which was probably due
to the difference in the excitation wavelength
and/or saturation of the CCD camera used in the
DiamondView instrument.