As a rule, evaluation of diamond colour is carrying out visually, because creation of the measuring devices is a complex problem due to influence of defects in diamonds (irregularity of coloration, cracks and graphite inclusions). And elimination of this influence is a very difficult task. In this work, an analysis of visual diamond colour evaluation methods and assessment of known devices for objective diamond colour measurements is carried out. As a result, an installation for measuring diamond colour is offered, which as much as possible meets the visual evaluation conditions.
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