| 摘要 |
Further it is an object of the present invention to provide a method for evaluating a diamond comprising the steps of selecting a diamond to value, determining the shape, size, color, clarity and cut of the selected diamond, determining a base price of the selected diamond, calculating the applicable discounts/premium for the parameters of the selected diamond, calculating a weightage for each parameter of the selected diamond for which a discount/premium is calculated, calculating a total adjusted price based on the discount/premium determined, the weightage determined and the base price determined in step d, and outputting the calculated total adjusted price. Further it is an object of the present invention to provide a method for determining the discounts/premium applicable to each parameter for a diamond-by selecting records of a given shape, size, color, clarity and cut-where the corresponding parameters are equal or within a specified small range, with the exception of parameter i and then determining the average sales price Y for a diamond for the ideal value V(0) of the selected parameter i, determining an average price Y(i) for a diamond with the selected parameter value of V(i), calculating a discount/premium D(i) of the selected diamond using the formula D(i)=(Y-Y(i))/Y, and repeating for each additional parameter V(i) determined. Further, the discount/premium with respect to the base/standard/index diamond, D'(i) is calculated as D'(i)=[D(i)-D(I)]/[1-D(I)] where D(I) is the discount/premium of the base/standard/index diamond. Further it is an object of the present invention to provide a method for determining the weightage for each parameter of the selected diamond by regression analysis for each parameter i.
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