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Patent for Sale:

Color Grading of Diamonds    

The technology relates to an invention comprises systems, techniques and equipment for measuring and analyzing diamond color.


The method involves submerging the diamond in an optically clear liquid and directing light from a diffuse daylight-approximating source through the table facet of the submerged diamond. A color digital camera is used to obtain image data from the diamond for color analysis and grading.

Traditional diamond grading by eye will be affected by individual color perceptions, light environment, light reflections, etc. The invention provides a simple, convenient, consistent and inexpensive method for diamond color grading and could be correlated with industry grading scales.

Primary Application of the Technology

Diamond grading.
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