This instrument has recently been developed in
practice by the GIA and is very similar to the Koloriskop G + S. It is
fitted with two daylight tubes and a long-wave ultra violet tube for
fluorescence testing. The spacious interior is uniformly lit and permits
comfortable operating. A stone-holder very similar to the Color-Grader
belongs to the instrument. It consists of white transparent artificial
material. The channel in which the comparison stones lie is movable and
enables the most favorable angle of light incidence to be easily found.
The stone holder can be used as wished, either by the usual method under
the light source or placed over the light slot on the top of the
instrument, so that the light shines through the translucent
stone-holder, lighting the stones from below (Fig 11).
|(Fig 11). Diamond Lite
||color Grading is made easier using a low magnification:
here the use of a lens worn on the forehead is shown