TH70706B - System and method for evaluating the appearance of uncut gemstones - Google Patents

Abstract

DC60 (04/01/45) Historically, of the "four characteristics"—carat weight, color, clarity, and cut style—cut style has been the most complex to understand and evaluate. This patent application presents a three-dimensional mathematical model to study the interaction of light with a perfectly round, colorless, and symmetrical cut diamond. This model allows for an analysis of the degree to which different aspects of appearance (sparkle, brilliance, and luster) are proportional. The model generates images and numerical measurements of the optical performance of a round diamond, known as the DCLR, which approximates its overall brilliance. The DCLR values vary with variations in the proportions of the cut style. In particular, the angle of the apex, the angle of the undercut, the size of the apex, the length of the star-cut facet, the size of the base and the length of the star-cut facet. The invention describes various combinations of proportions with DCLRs equal to or higher than those of the "ideal" cut, and these DCLR ratings may be balanced against other factors such as brilliance and luster to produce cut grades for existing diamonds or to analyze cut styles for the expected cut styles of uncut diamonds. Historically, of the "four characteristics" of carat weight, color, clarity and cut style, cut style has been the most complex to understand and evaluate. This patent application provides a three-dimensional mathematical model to study their interactions. of light with a perfectly round, colorless, and symmetrical cut diamond. By means of this model, it is possible to analyze to what extent different aspects of appearance (sparkle, brilliance, and luster) depend on different proportions. The model generates images and numerical measurements of the optical performance of a round diamond, called the DCLR, which approximates the overall brilliance. The DCLR values vary with variations in the proportions of the cut pattern, particularly the angle of the crown, the angle of the inframargin, the size of the crown, the length of the star-cut facet, the size of the base facet, and the length of the inframargin cut facet. The invention describes various combinations of proportions with a DCLR equal to or higher than that of the "ideal" cut pattern, and ranking these DCLR values may be balanced against other factors such as sparkle and The brilliance can be used to grade the cut pattern of an existing diamond or to analyze the cut pattern to determine the expected cut pattern of an uncut diamond.

Claims (9)

All rights that will not appear on the advertisement page: Edited 10/07/2019 No rights ------------ Edited 11/12/2018 No rights ---------- Edited 08/03/2017 1. A method for grading cuts of gemstones, comprising illuminating a model of gemstone with a point light source at an infinite distance, refracting light components, originating from the point light source, through the model of gemstone, and evaluating the light of the model of gemstone using a matrix, wherein the light evaluation includes calculation of the dispersed color light return. 2. The method of claim 1, wherein the DCLR is the sum (over the wavelength of the light components) of the sum (over the number of light components) of the different areas of each light component exceeding the initial density squared threshold, multiplied by a weighting factor of the exit angle. 3. The method of claim 2, wherein the weighting factor of said exit angle is the square of the cosine of the exit angle. 4. The method of claim 2, wherein the sum of the number of light components simply counts the refracted light components exceeding the initial square density value based on the color sensitivity of the human eye. 5. The method of claim 2, wherein the initial square density is eliminated for the refracted light component by approximately 1% of the square density of the brightest light component. 6. The method of claim 2, wherein the initial square density is eliminated for the refracted light component by approximately 0.1% of the square density of the brightest light component. 7. The method of claim 2, wherein the initial square density is eliminated for the refracted light component by approximately 0.01% of the square density of the brightest light component. 8. A method for grading cuts of gemstones, comprising analyzing the cut proportions of the gemstone, comparing the cut proportions of the gemstone with a list of proportion grades based at least in part on calculations of diffused light reflections, and grading the gemstone on the basis of said list of proportion grades, where Δ is the light grade. ----------------------- A method for grading cuts of gemstones comprising the steps of illuminating a model of the rough gemstone using a simulated light source from infinity; and evaluating the radiance of the model of the rough gemstone using mathematical measurements. The method of claim 1, further comprising the steps of refracting a component of light through said model of the rough gemstone. The method of claim 2, wherein the steps of evaluating the radiance using mathematical measurements are considered. The total number of light elements, the length distribution of the light elements and the angular distribution of the light elements for a rough gemstone model. The method of claim 3, wherein the step of estimating the radiance using said mathematical measurements further comprises the step of determining the onset of the power density for said light elements. The method of providing a grade of cut pattern for the rough gemstone comprising the step of illuminating the model using a simulated light source at infinity; refracting the light elements originating from the light source through the rough gemstone model. Evaluating the radiance of the rough gemstone model using said mathematical measurements. The method of claim 5, wherein the step of estimating the radiance of the rough gemstone further comprises the step of recording the light elements that appear to be refracted from the top of the rough gemstone model from the perspective of a hemispherical observer. The method of claim 6, wherein the observer Said hemisphere is located at an infinite distance from the model of said uncut gemstone. The method of claim 5, wherein the step of estimating the brilliance value is combined with the calculation of the DCLR. 9. The method of claim 8, wherein the DCLR is the sum (by wavelength of the light components) of the sum (by number of light components) of the differential area of each light component exceeding a threshold power density threshold multiplied by a weighting factor of the exit angle.1. The method of claim 9, wherein the weighting factor of the exit angle is the square of the cosine of the exit angle.1. The method of claim 9, wherein the sum of the number of light components simply counts the refracted light components exceeding a threshold power density threshold based on the color sensitivity of the human eye.1. The method of claim 9, wherein the cutoff portion of the refracted light components exceeding a threshold power density threshold is about 1% of the power density of the brightest light component.1. The method of claim 9, wherein the cutoff portion of the refracted light components exceeding a threshold power density threshold is about 1% of the power density of the brightest light component. The refracted light component has a value of approximately .01% of the power density of the brightest light component.1 The method of claim 9, wherein the portion removed, which is the onset of the refracted light component, has a value of approximately .01% of the power density of the brightest light component.1 The method of preparing cut pattern grades for rough gemstones comprising the steps of analyzing the proportions of the rough gemstone; comparing the cut pattern grades to a list of proportion grades based at least in part on a calculation of the reflectance with color dispersion; preparing a grade for the rough gemstone based on said list of proportion grades.1 The method of claim 15, wherein the grades provided include an assessment of the symmetry of the rough gemstone.1 The method of claim 15, wherein the grades provided include: Gloss Assessment.1 The method of claim 15, wherein the grade provided includes the assessment of the color of the rough gemstone.1 The method of claim 15, wherein the grade provided includes the assessment of the luminescence.2 The method of claim 15, wherein the grade provided includes the assessment of the impurities in the rough gemstone.2 The method of claim 15, wherein the grade provided includes the assessment of the inclusions in the rough gemstone.2 The method of claim 15, wherein the grade provided includes the assessment of the condition of the edges between the facets of the rough gemstone.2 The method of claim 15, wherein said grade includes the assessment of the brilliance and the luster.2 The method of claim 15, wherein said grade includes the assessment of the brilliance, the luster and the luster. brilliance together.2 The method of claim 15, wherein said grade is the grade of brilliance.2 The method of generating a diamond grading report comprising the steps of evaluating the proportions of the diamond cut pattern; listing the proportions of the diamond cut pattern in the diamond grading report; comparing said proportions of the cut pattern with a list of proportion grades based at least in part on a calculation of the diffused light reflectance; inserting a digital image of the virtual diamond into said report, wherein said image is based at least in part on said list of proportion grades.2 The method of generating a diamond grading report comprising the steps of evaluating the proportions of the diamond cut pattern; listing the proportions of the cut pattern in the diamond grading report; comparing said proportions of the cut pattern with a list of proportion grades based at least in part on a calculation of the diffused light reflectance; preparing a numerical grade of the diamond in said report, wherein the grade Such figures shall be based at least in part on the aforementioned list of proportion grades.2 A method of preparing target proportions for diamond cutting comprising the steps of determining the size of a rough diamond; comparing a list of possible cut shapes of a rough gemstone with a list of proportion grades, which are at least in part based on calculations of diffused light reflectance; preparing target proportions for rough gemstones based on a list of proportion grades.2 A method of diamond cutting comprising the steps of determining the size of a rough diamond; determining the proportions of possible cut shapes for a diamond; comparing the proportions of such possible cut shapes with a list of proportion grades, which are at least in part based on calculations of diffused light reflectance; cutting such rough diamonds.3 A method of preparing grades of cut shapes for rough gemstones comprising Analysis of the cut pattern proportions of raw gemstones; comparison of the cut pattern proportions of raw gemstones with a list of grades of proportions, which are at least partly dependent on the size of the base facet; preparation of the brilliance grade of raw gemstones based on a list of grades of proportions. 3 The method of preparing the cut pattern grading of raw gemstones consists of analysis of the cut pattern proportions of raw gemstones; comparison of the cut pattern proportions of raw gemstones with a list of grades of proportions, which are at least partly dependent on the size of the top facet; preparation of the brilliance grade of raw gemstones based on a list of grades of proportions. 3. Methods of preparing cut pattern grades for raw gemstones, comprising: analyzing the proportions of the cut pattern of the raw gemstone; comparing the proportions of the cut pattern of the raw gemstone with a list of grades of proportions, which are at least partly dependent on the angle of the tops; preparing the grades of the brilliance of the raw gemstones based on a list of grades of such proportions; 3. Methods of preparing cut pattern grades for raw gemstones, comprising: analyzing the proportions of the cut pattern of the raw gemstone; comparing the proportions of the cut pattern of the raw gemstone with a list of grades of proportions, which are at least partly dependent on the angle of the section below the edge between the faces; preparing the grades of the brilliance of the raw gemstones based on a list of grades of such proportions. Analysis of the cut pattern proportions of raw gemstones; comparing the cut pattern proportions of raw gemstones with a list of grades of proportions, which are at least partly dependent on the number of facets of the interfacial area; preparing the brilliance grade of raw gemstones based on a list of grades of proportions.3 Methods for preparing cut pattern grading of raw gemstones, which include analysis of the cut pattern proportions of raw gemstones; comparing the cut pattern proportions of raw gemstones with a list of grades of proportions, which are at least partly dependent on the thickness of the interfacial area; preparing the brilliance grade of raw gemstones based on a list of grades of proportions.3 Methods for preparing cut pattern grading of raw gemstones, which include analysis of the cut pattern proportions of raw gemstones; 3. Method of preparing cut pattern grading for raw gemstones comprising analysis of cut pattern proportions of raw gemstones; comparing cut pattern proportions of raw gemstones with a list of grades of proportions, which are at least partially dependent on the length of the star-cut facets; preparing a grade of brilliance of raw gemstones based on a grade of proportions. 3. Method of generating a diamond grading report comprising the steps of evaluating cut pattern proportions of diamonds; listing cut pattern proportions of diamonds in a diamond grading report; comparing cut pattern proportions of such gemstones with a grade of proportions comprising Assessing the brilliance of a diamond and, at least in part, depending on the size of the facets; preparing a numerical grade of said diamond in a report, wherein the numerical grade is at least in part based on said list of proportion grades. 3. The method of claim 38, wherein the numerical grade is the brilliance grade. 4. A method of generating a diamond grading report comprising the steps of evaluating the proportions of the cut pattern of the diamond; listing the proportions of the cut pattern of the diamond in the diamond grading report; comparing the proportions of the cut pattern to a list of proportion grades comprising the brilliance assessment and, at least in part, depending on the angle of the facets; preparing a numerical grade of said diamond in a report, wherein the numerical grade is at least in part based on said list of proportion grades. 4. The method of claim 40, wherein the numerical grade is the brilliance grade. 4. A method of generating a diamond grading report comprising the steps of evaluating the proportions of a diamond's cut pattern; listing the proportions of the diamond's cut pattern in the diamond grading report; comparing said proportions with a list of grades of proportions comprising an assessment of the diamond's brilliance and at least partly based on the angle of the facets below the interlaminar; preparing a numerical grade of said diamond in the report, wherein the numerical grade is at least partly based on the said list of proportion grades. 4 The method of claim 42, wherein the numerical grade is the brilliance grade. 4 A method of generating a diamond grading report comprising the steps of evaluating the proportions of a diamond's cut pattern; listing the proportions of the diamond's cut pattern in the diamond grading report; comparing said proportions with a list of grades of proportions comprising an assessment of the diamond's brilliance and at least partly based on the angle of the facets below the interlaminar; Depending on the number of facets of the cut edges; preparing a numerical grade of said diamond in a report, wherein said numerical grade is at least partly based on said list of grades of proportion. 4. The method according to claim 44, wherein said numerical grade is the grade of brilliance. 4. A method of generating a diamond grading report comprising the steps of evaluating the proportions of a diamond's cut pattern; listing the proportions of the diamond's cut pattern in the diamond grading report; comparing said proportions with a list of grades of proportions comprising an assessment of the diamond's brilliance and at least partly based on the thickness of the interfacial margin; preparing a numerical grade of said diamond in the report, wherein the numerical grade is at least partly based on the said list of proportion grades. 4. A method according to claim 46, wherein the numerical grade is the brilliance grade. 4. A method of generating a diamond grading report comprising the steps of evaluating the proportions of a diamond's cut pattern; listing the proportions of the diamond's cut pattern in the diamond grading report; comparing said proportions with a list of grades of proportions comprising an assessment of the diamond's brilliance and at least partly based on the thickness of the interfacial margin. dependent on the length of the star-cut facets; preparing a numerical grade of said diamond in the report, wherein the numerical grade is at least partly based on said list of proportion grades. 4. The method of claim 48, wherein the numerical grade is the grade of brilliance. 5. A method of generating a diamond grading report comprising the steps of evaluating the proportions of the diamond's cut pattern; listing the proportions of the diamond's cut pattern in the diamond grading report; comparing the proportions of said cut pattern with a list of proportion grades comprising the brilliance assessment and at least partly based on the length of the lower facets; preparing a numerical grade of said diamond in the report, wherein the numerical grade is at least partly based on said list of proportion grades. 5. The method of claim 50, wherein the numerical grade is the grade of brilliance. 5 A method of generating a diamond grading report comprising the steps of evaluating the proportions of a diamond's cut; listing the proportions of the diamond's cut in the diamond grading report; comparing said proportions to a list of grades of proportions comprising an assessment of the diamond's brilliance and at least partly based on the size of the base facet; providing a numerical grade of said diamond in the report, wherein the numerical grade is at least partly based on the said list of proportion grades. 5 The method of claim 52, wherein the numerical grade is the brilliance grade. 5 A system for providing grades of cut for rough gemstones, comprising a means for illuminating a model of the rough gemstone using a light source simulated at infinity; and a method for evaluating the brilliance of a rough gemstone model using mathematical measurements. 5 The system of claim 54 further comprises a method for refracting light elements through the rough gemstone model. 5 The system of claim 55, wherein the method for evaluating the brilliance uses mathematical measurements that determine the total number of light elements, the length distribution of the light elements and the angular distribution of the light elements for the rough gemstone model. 5 The system of claim 56, wherein the method for evaluating the brilliance using mathematical measurements further comprises the step of determining the power density threshold for the said light elements. 5 A system for providing a grade of cut pattern for the rough gemstone, comprising a method for illuminating the model using a light source modeled from infinity; a method for refracting the light elements originating from the light source. .5 The system of claim 56, wherein said system for evaluating the radiance of said rough gemstone comprises a system for recording the component of light that appears to be refracted from the top of the rough gemstone model from the point of view of a hemispherical observer; 6 the system of claim 57, wherein said hemispherical observer is at an infinity distance from said rough gemstone model; .6 the system of claim 56, wherein said system for evaluating the radiance includes calculating the DCLR; .6 the system of claim 59, wherein the DCLR is the sum (by wavelength of the component of light) of the sum (by number of component of light) of the different areas of each component of light. and the excess of the threshold at which the power density changes, multiplied by a factor of the exit angle. 6 The system of claim 60, wherein the weighting factor of the exit angle is the square of the cosine of the exit angle. 6 The system of claim 60, wherein the sum of the number of line elements of the light is simply the sum of the refracted light elements that exceed the threshold at which the power density changes, based on the color sensitivity of the human eye. 6 The system of claim 60, wherein the cut-off portion at which the refracted light elements change is about 1% of the power density of the brightest light element. 6 The method of claim 60, wherein the cut-off portion at which the refracted light elements change is about 1% of the power density of the brightest light element. 6. The method of claim 66, wherein the portion removed, which is the starting point of the refracted light component, is approximately .01% of the power density of the brightest light component. 6. A system for providing grades of cut patterns for rough gemstones comprising steps of a method for determining the proportions of the rough gemstone; a method for comparing the proportions of the cut patterns to a list of proportion grades based at least in part on a calculation of the diffused reflectance of light; a method for providing grades for rough gemstones based on said list of proportion grades. 6. The system of claim 66, wherein the method for providing grades comprises a method for evaluating the symmetry of the rough gemstone. 7. The system of claim 66, wherein the method for providing grades comprises a method for evaluating the glossiness. 7. The system of claim 66, wherein the method for providing grades comprises a method for evaluating the glossiness. 7. The grading method comprises a method for evaluating the color of the rough gemstone. 7. The system of claim 66, wherein the grading method comprises a method for evaluating the luminescence. 7. The system of claim 66, wherein the grading method comprises a method for evaluating impurities in the rough gemstone. 7. The system of claim 66, wherein the grading method comprises a method for evaluating inclusions in the rough gemstone. 7. The system of claim 66, wherein the grading method comprises a method for evaluating the interfacial condition. 7. The system of claim 66, wherein the grading method comprises a method for evaluating the brilliance and the luster together. 7. The system of claim 66, wherein the grading method comprises a method for evaluating the brilliance, the luster and the luster. 7. The system of claim 66, wherein the grading method comprises a method for evaluating the brilliance, the brilliance and the luster. Comprising a method for preparing a grade of brilliance.7 A system for generating a diamond grading report comprising a method for evaluating the proportions of a diamond's cut; a method for listing the proportions of a diamond's cut in a diamond grading report; a method for comparing such cut proportions with a list of grades of proportions based at least in part on reflectance calculations with chromaticity; a method for inserting a digital image of a virtual diamond into such report, such that such image is based at least in part on such a list of grades of proportions.8 A system for generating a diamond grading report comprising a method for evaluating the proportions of a diamond's cut; a method for listing the proportions of a diamond's cut in a diamond grading report; a method for preparing a numerical grade of such diamond in such report, such that such numerical grade is based on such a list of grades. .8 A system for preparing target proportions in diamond cutting, comprising a means for comparing a list of possible cut shape proportions of a rough gemstone with a list of proportion grades based at least in part on calculations of diffused reflectance; a means, incorporating a processor, for preparing target proportions for rough gemstones based on a list of proportion grades. .8 A system for cutting diamonds, comprising a means for determining the proportions of possible cut shapes of a diamond; a means for comparing the proportions of such possible cut shapes with a list of proportion grades based at least in part on calculations of diffused reflectance. .8 A system for preparing grades of cut shapes for rough gemstones, comprising A method for grading the cut patterns of rough gemstones; a method for comparing the cut patterns of rough gemstones to a list of grades of proportions which depend at least partly on the size of the base facet; a method for grading the brilliance of rough gemstones based on a list of grades of proportions. 8 A system for grading cut patterns of rough gemstones comprising A method for analyzing the cut patterns of rough gemstones; a method for comparing the cut patterns of rough gemstones to a list of grades of proportions which depend at least partly on the size of the top facet; a method for grading the brilliance of rough gemstones based on a list of grades of proportions. 8 A system for grading cut patterns of rough gemstones comprising A method for analyzing the proportions of cut patterns in rough gemstones; a method for comparing the proportions of cut patterns in rough gemstones to a list of proportion grades, which depend at least in part on the angle of the facets; a method for grading the brilliance of rough gemstones based on a list of proportion grades; 8 systems for grading cut patterns in rough gemstones comprising a method for analyzing the proportions of cut patterns in rough gemstones; a method for comparing the proportions of cut patterns in rough gemstones to a list of proportion grades, which depend at least in part on the angle of the facets below the interfacial edge; a method for grading the brilliance of rough gemstones based on a list of proportion grades. 8. A system for grading cut patterns for rough gemstones, comprising a method for analyzing the proportions of cut patterns in rough gemstones; a method for comparing the proportions of cut patterns in rough gemstones to a list of proportion grades, which depend at least in part on the number of facets of the interfacial area; a method for grading the brilliance of rough gemstones based on a list of proportion grades. 8. A system for grading cut patterns for rough gemstones, comprising a method for analyzing the proportions of cut patterns in rough gemstones; a method for comparing the proportions of cut patterns in rough gemstones to a list of proportion grades, which depend at least in part on the thickness of the interfacial area; Method for grading the brilliance of rough gemstones based on a list of proportion grades. .8 A system for grading the cut pattern of rough gemstones comprising a method for analysing the proportions of the cut pattern of rough gemstones; a method for comparing the proportions of the cut pattern of rough gemstones with a list of proportion grades which are at least partly dependent on the length of the star-cut facet; a method for grading the brilliance of rough gemstones based on a list of proportion grades. .9 A system for grading the cut pattern of rough gemstones comprising a method for analysing the proportions of the cut pattern of rough gemstones; a method for comparing the proportions of the cut pattern of rough gemstones with a list of proportion grades which are at least partly dependent on the length of the facet. Between the lower facets; a means for preparing a grade of clarity for rough gemstones based on a list of proportion grades; 9 a system for preparing cut pattern grades for rough gemstones comprising a means for listing the proportions of the cut pattern of the diamond in a diamond grading report; a means for comparing the proportions of the cut pattern with a list of grades of proportions comprising an assessment of the clarity of the diamond and at least partly based on the size of the upper facets; a means for preparing a numerical grade of the diamond in a report, wherein the numerical grade is at least partly based on the list of proportion grades. 9 a system according to claim 63, wherein the numerical grade is the grade of clarity. 9 a system for generating a diamond grading report comprising a means for evaluating the proportions of the cut pattern of the diamond; a means for listing the proportions of the cut pattern of the diamond in a diamond grading report; A method for comparing the proportions of said cut pattern with a list of proportion grades comprising an assessment of the brilliance of the diamond and at least partly based on the angle of the facets; a method for preparing a numerical grade of said diamond in a report, wherein the numerical grade is at least partly based on the said list of proportion grades.9 The system of claim 93, wherein the numerical grade is the grade of brilliance.9 A system for generating a diamond grading report comprising a method for evaluating the proportions of said cut pattern; a method for listing the proportions of said cut pattern in a diamond grading report; a method for comparing the proportions of said cut pattern with a list of proportion grades comprising an assessment of the brilliance of the diamond and at least partly based on the angle of the facets; a method for preparing a numerical grade of said diamond in a report, wherein the said numerical grade is A method for evaluating the proportions of diamond cuts in a diamond grading report comprising a method for evaluating the proportions of diamond cuts in a diamond grading report; a method for comparing the proportions of diamond cuts in a diamond grading report with a method for evaluating the proportions of diamond cuts in a diamond grading report; a method for preparing the numerical grades of diamonds in a report; a method for evaluating the proportions of diamond cuts in a diamond grading ... A means for listing the various proportions of a diamond's cut in a diamond grading report; a means for comparing said proportions of a diamond's cut with a list of grades of proportions consisting of an assessment of the diamond's brilliance and based at least in part on the thickness of the interlaminar margin; a means for preparing a numerical grade of said diamond in a report, wherein said numerical grade is at least in part based on said list of proportion grades.10 The system according to claim 99, wherein said numerical grade is the brilliance grade. 10. A system for generating diamond grading reports comprising: a method for evaluating the proportions of cut patterns of diamonds; a method for listing the proportions of cut patterns of diamonds in a diamond grading report; a method for comparing said diamond cut proportions to a list of grades of proportions comprising an assessment of the brilliance of the diamonds and at least partly based on the length of the faceted star shape; a method for preparing a numerical grade of said diamonds in a report wherein the numerical grade is at least partly based on the list of proportion grades.10. A system according to claim 101, wherein the numerical grade is the brilliance grade.10. A system for generating diamond grading reports comprising: a method for evaluating the proportions of cut patterns of diamonds; a method for listing the proportions of cut patterns of diamonds in a diamond grading report; A method for comparing the proportions of said diamond cut pattern to a list of proportion grades comprising an assessment of the brilliance of the diamond and at least partly based on the length of the base facets; a method for preparing a numerical grade of said diamond in a report wherein the numerical grade is at least partly based on the said list of proportion grades. .10 A system according to claim 103, wherein the numerical grade is the brilliance grade. .10 A system for generating a diamond grading report comprising a method for evaluating the proportions of said diamond cut pattern; a method for listing the proportions of said diamond cut pattern in a diamond grading report; a method for comparing the proportions of said diamond cut pattern to a list of proportion grades comprising an assessment of the brilliance of the diamond and at least partly based on the size of the base facets: a method for preparing a numerical grade of said diamond in a report wherein the said numerical grade is 10. A system for generating diamond grading reports comprising a method for evaluating the proportions of cut patterns of a diamond; a method for listing the proportions of cut patterns of a diamond in a diamond grading report; a method for comparing said proportions of cut patterns with a list of proportions comprising a radiance rating of the diamond and at least partly based on the height of the crown; a method for preparing a numerical grade of the diamond in a report, wherein said numerical grade of the diamond in a report, wherein said numerical grade is at least partly based on a list of proportions of grades of a diamond. 10. A system according to claim 107, wherein said numerical grade is a radiance rating of a diamond. 10. A system for generating diamond grading reports comprising a method for evaluating the proportions of cut patterns of a diamond; A method for listing the proportions of a diamond's cut in a diamond grading report; a method for comparing said proportions of a diamond's cut with a list of grades of proportions consisting of an assessment of the diamond's brilliance and based at least in part on the depth of the facet below the interlaminar margin; a method for preparing a numerical grade of said diamond in a report wherein said numerical grade is at least in part based on said list of grades of proportions.11 The system according to claim 109, wherein said numerical grade is the grade of brilliance.