COMPUTERIZED METHOD AND SYSTEM FOR LIGHT PERFORMANCE GRADING OF GEMSTONES BY ONE SINGLE GRADING SCALE

摘要

There are provided computerized methods and systems of producing a single grading scale, and for using it, for grading gemstones such as diamonds based on pre-defined parameters thereof, wherein each single grade in the scale is associated with unique groups of unique value ranges of the parameters in a statistically relevant sample of gemstones, the unique groups being established at least based on an aimed statistic distribution of gemstones through the grades in the grading scale. There is also provided a gemstone grading report comprising indication of a grade for the gemstone in the single grading.

主权项

1. A method of generating a single grading scale for gemstones using a computer comprising a processor operatively coupled to a memory, said method comprising:
setting a plurality of grades characterizing the single grading scale from high to low, and setting an aimed statistic distribution of gemstones through the grades in said grading scale; defining parameters of gemstones, based on which the grading is to be performed; measuring values of each of said parameter for each gemstone in a statistically relevant sample of gemstones, thus giving rise to a plurality of the measured values for each parameter; processing said plurality of the measured values by deriving from said measured values unique groups relating to all the parameters; generating clusters of said unique groups to define respective grades of said plurality of grades so that a distribution of the gemstones in said statistically relevant sample in accordance with the generated clusters corresponds to said aimed statistic distribution in the single grading scale; and storing in the memory a data structure comprising the generated clusters associated with the respective grades, the stored data structure to be used as the single grading scale for grading a gemstone characterized by specific values of said defined parameters.