The pearl evaluation system of the present invention uses an image data receiving unit (410) that acquires image data of pearls, and a pearl based on a system determination criterion that is determined in advance by information about colors using the acquired image data of pearls. Type discriminating unit (210) for determining which of the three systems belongs to, and the system to which the determined pearl belongs among the three grade determination criteria determined in advance corresponding to the three systems And a grade discriminating unit (220) for judging the grade of the pearl from which the system to which it belongs is judged on the basis of the grade judgment standard corresponding to.
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