Illustrated report for brilliant

Polished Brilliant
Brilliant
29.11.2025
Model Shadow scan
Expert name N/A
Scale weight, ct N/A
Corrected mass, ct 1.86, 1.8592
Measurements 7.870 (7.843-7.885) x 4.865 / 0.006 (mm)
Spread -0.06ct, -3.30 %
AGS Spread -0.06 ct, -3.44%
Extra Facet Girdle / Nat No
Width Length Ratio (L/W) Diameter Minimum Diameter Maximum Diameter Average Total height
7.843 mm 7.885 mm 1.005 7.843 mm 7.885 mm 7.870 mm 4.865 mm
 
Crown height Pavilion height Table Culet Girdle height
Bezel Bone Valley
1.195 mm 3.373 mm 4.435 mm 0.030 mm 0.298 mm 0.289 mm 0.163 mm
Appraiser title Lexus_Opt_12FEB2011
Overall cut quality --
Symmetry appraiser title Symmetry
Overall symmetry quality VG
Final grade N/A
Model building info The model has small errors
   
Color
Clarity
Polish
Fluorescence
Parameter Avg Min Max Dev Cut Grade Sym Grade
Diameter, mm 7.870 7.843 7.885 0.54% -- EX
Radius, mm 3.933 3.911 3.948 0.037% – –
Crown angle, ° 34.80 34.71 34.86 0.15 EX EX
Pavilion angle, ° 40.70 40.61 40.82 0.20 EX EX
Total height, % 61.82 – – – VG –
Crown height, % 15.18 14.97 15.41 0.44 EX EX
Crown height bone, % 15.41 15.08 15.75 0.67 – –
Pavilion height, % 42.85 42.58 43.04 0.46 – –
Pavilion upperbone, % 42.72 42.28 42.95 0.68 – –
Table, % 56.35 56.25 56.44 0.19 EX EX
Culet, % 0.38 0.30 0.44 0.14 GD EX
Girdle height bezel, % 3.78 3.64 4.02 0.38 EX EX
Girdle height bone, % 3.68 3.49 3.98 0.48 – EX
Girdle height 2.06 1.65 2.60 0.94 N/A EX
valley, %
Star: 46.62: 45.72: 47.61: 1.89 EX EX
Upper ratio, % 53.38 54.28 52.39
Star angle, ° 21.11 20.82 21.36 0.54 – EX
Upper girdle 41.54 40.91 42.23 1.32 – VG
angle, °
Length girdle 77.35 76.52 77.90 1.38 EX EX
facet, %
Lower girdle angle / 41.82 41.66 41.98 0.32 – EX
Halves angle, °
Facet Twist, ° 0.29 0.05 0.52 0.47 – EX
Crown height, mm 1.195 1.178 1.213 0.034 EX EX
Pavilion height, mm 3.373 3.351 3.387 0.036 – –
Table, mm 4.435 4.427 4.442 0.015 EX EX
Culet, mm 0.030 0.024 0.035 0.011 GD EX
Girdle height bezel, mm 0.298 0.286 0.316 0.030 EX EX
Measurement as per OctoNus theory:
Crown angle, ° 34.80 34.77 34.83 0.06 – –
Pavilion angle, ° 40.70 40.63 40.78 0.15 – –
Fish eye effect, ° 8.13 – – – N/A –
Culet through Crown Bezel, ° 9.13 – – – N/A –
Parameter, ° 1 2 3 4 5 6 7 8
Pav. azimuths dev. from ideal -0.05 -0.13 -0.02 0.05 -0.05 0.05 0.12 0.03
Crown azimuths dev. from ideal -0.36 -0.58 -0.41 -0.03 -0.31 -0.03 -0.42 -0.36
Crown painting -2.01 -1.34 -1.93 -1.59 -0.89 -0.16 -0.38 0.18
-0.92 0.06 -1.49 -0.46 -1.20 0.26 -2.35 -0.25
Pavilion painting 0.23 0.15 0.08 0.21 -0.25 0.45 0.04 0.40
0.12 0.25 0.43 0.07 0.24 0.24 0.37 0.42
Girdle center Culet center Table center Girdle center mass
Parameter     Sym Grade
Girdle-Culet offset by table axis 0.31 ± 0.18 % 0.024 ± 0.014 mm N/A
Girdle-Table offset by table axis 0.15 ± 0.16 % 0.012 ± 0.013 mm N/A
Table-Culet offset by table axis 0.45 ± 0.20 % 0.035 ± 0.016 mm N/A
Girdle to table-culet line offset 0.45 % 0.035 mm –
Parameter 1 2 3 4 5 6 7 8
Diameter, mm 7.875 7.866 7.877 7.882 – – – –
Radius, mm 3.943 3.934 3.939 3.939 3.931 3.932 3.938 3.943
Crown angle, ° 34.85 34.86 34.79 34.84 34.80 34.71 34.75 34.80
Pavilion angle, ° 40.72 40.65 40.72 40.74 40.68 40.61 40.69 40.82
Total height, % – – – – – – – –
Crown height, % 15.41 15.21 15.19 15.14 14.97 15.13 15.16 15.21
Crown height bone, % 15.56 15.75 15.32 15.08 15.23 15.41 15.33 15.63
Pavilion height, % 42.69 42.58 42.84 43.04 42.98 42.88 42.88 42.92
Pavilion upperbone, % 42.28 42.58 42.95 42.92 42.94 42.71 42.78 42.64
Table, % 56.34 56.25 56.37 56.44 – – – –
Culet, % – – – – – – – –
Girdle height bezel, % 3.72 4.02 3.79 3.64 3.86 3.80 3.77 3.68
Girdle height bone, % 3.98 3.49 3.54 3.81 3.64 3.70 3.70 3.55
Girdle height 2.55 2.60 2.01 1.88 1.82 1.79 2.25 2.14
valley, % 2.03 1.93 2.24 2.09 2.25 1.65 1.95 1.86
Star: 47.61: 47.03: 47.34: 45.72: 46.90: 45.98: 46.21: 46.16:
Upper ratio, % 52.39 52.97 52.66 54.28 53.10 54.02 53.79 53.84
Star angle, ° 21.36 21.32 21.09 21.06 20.99 20.82 21.15 21.07
Upper girdle 42.01 42.07 42.20 42.23 41.66 41.56 40.91 40.98
angle, ° 41.34 41.33 41.35 41.24 41.38 41.30 41.64 41.36
Length girdle 76.52 77.42 76.85 77.03 77.32 77.82 76.70 76.99
facet, % 77.80 77.49 77.53 77.88 77.29 77.90 77.33 77.71
Lower girdle angle / 41.77 41.79 41.77 41.81 41.94 41.90 41.83 41.78
Halves angle, ° 41.80 41.76 41.66 41.80 41.81 41.98 41.83 41.86
Facet Twist, ° 0.29 0.43 0.37 0.06 0.23 0.05 0.52 0.37
Crown height, mm 1.213 1.197 1.195 1.192 1.178 1.191 1.193 1.197
Pavilion height, mm 3.360 3.351 3.372 3.387 3.383 3.375 3.375 3.378
Table, mm 4.434 4.427 4.437 4.442 – – – –
Culet, mm – – – – – – – –
Girdle height bezel, mm 0.293 0.316 0.298 0.286 0.304 0.299 0.297 0.289
 
Measurement as per OctoNus theory:
Crown angle, ° 34.83 34.78 34.77 34.82 – – – –
Pavilion angle, ° 40.70 40.63 40.71 40.78 – – – –
MIC, mm 7.837 Extra Facet Crown No –
Girdle to MIC, mm 0.006 Extra Facet Pavilion No –
Paint / Dig Avg Type Cut Grade Max Dev Sym Grade
Crown, ° -0.90 Digging N/A -2.35 EX
Crown,notch. 0.2, Very small 0.6
Pavilion, ° 0.22 N/A 0.45 EX
Pavilion,notch. 0.1, Negligible 0.1