Standard report for brilliant

General information

Model Simple
Expert name Makoed A.G.
Report date 07.03.2008
Real weight, ct
Calculated weight, ct 0.73, 0.7286
Appraiser title GIA_PCTG_StarCul
Overall cut quality E
Symmetry appraiser title Internal
Overall symmetry quality EX
Spread 0.00 ct, 0.08%
AGS Spread N/A ct, N/A%
Measurements 5.821 (5.817-5.826) x 3.530 / 0.004 mm
Girdle to MIC 0.004 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.821
Crown height 0.854
Pavilion depth 2.499
Total height 3.530
Table 3.339
Culet 0.021
Girdle Bezel 0.177
Girdle Bone 0.171
Girdle Valley 0.077

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.821 5.817 5.826 0.14% E EX 5.822 5.821 5.820 5.819        
Crown angle, 34.55 34.38 34.71 0.33 Grading EX 34.51 34.38 34.40 34.58 34.63 34.71 34.62 34.55
Pavilion angle, 40.73 40.60 40.94 0.34 Grading EX 40.78 40.94 40.87 40.75 40.67 40.60 40.60 40.67
Total height, % 60.64       E                  
Crown height, % 14.68 14.52 14.77 0.25 E EX 14.52 14.60 14.63 14.76 14.77 14.75 14.71 14.68
Pavilion depth, % 42.93 42.73 43.16 0.43 N/A EX 43.11 43.16 43.00 42.82 42.77 42.73 42.85 42.97
Table, % 57.36 57.22 57.47 0.25 Grading EX 57.47 57.42 57.34 57.22        
Culet, % 0.36 0.32 0.39 0.07 E EX                
Girdle Bezel, % 3.04 2.88 3.16 0.28 E EX 3.00 2.88 3.03 3.06 3.10 3.16 3.07 2.99
Girdle Bone, % 2.94 2.85 3.03 0.18   EX 2.95 2.86 2.85 2.89 3.03 2.99 2.98 3.01
Girdle Valley, % 1.32 1.20 1.42 0.22 E EX 1.40 1.20 1.25 1.24 1.32 1.24 1.32 1.33
1.36 1.35 1.42 1.34 1.36 1.32 1.33 1.33
Star:
Upper ratio, %
55.99: 55.42: 56.68: 1.26     56.23: 55.49: 55.97: 55.83: 55.87: 56.41: 56.68: 55.42:
44.01 44.58 43.32 43.77 44.51 44.03 44.17 44.13 43.59 43.32 44.58
Star angle, 22.81 22.57 23.05 0.48   EX 22.83 22.57 22.86 22.90 22.71 22.94 23.05 22.64
Upper girdle angle, 42.39 42.04 42.76 0.73   EX 42.31 42.32 42.26 42.11 42.26 42.32 42.49 42.56
42.04 42.40 42.56 42.76 42.61 42.64 42.20 42.37
Lower girdle angle / Halves angle, 41.82 41.65 42.02 0.38   EX 41.86 42.00 42.02 41.98 41.93 41.90 41.83 41.78
41.80 41.74 41.65 41.66 41.70 41.72 41.78 41.84
Twist, 0.23 0.04 0.43 0.39   EX 0.28 0.08 0.23 0.43 0.04 0.25 0.18 0.35
Crown height, mm 0.854 0.845 0.860 0.015 E EX 0.845 0.850 0.851 0.859 0.860 0.858 0.857 0.854
Pavilion depth, mm 2.499 2.487 2.512 0.025 N/A EX 2.509 2.512 2.503 2.492 2.490 2.487 2.494 2.501
Table, mm 3.339 3.331 3.345 0.015 Grading EX 3.345 3.342 3.338 3.331        
Culet, mm 0.021 0.018 0.023 0.004 E EX                
Girdle Bezel, mm 0.177 0.167 0.184 0.016 E EX 0.175 0.167 0.176 0.178 0.180 0.184 0.179 0.174
Girdle Bone, mm 0.171 0.166 0.176 0.010   EX 0.171 0.167 0.166 0.168 0.176 0.174 0.173 0.175
Girdle Valley, mm 0.077 0.070 0.082 0.013 E EX 0.082 0.070 0.073 0.072 0.077 0.072 0.077 0.077
0.079 0.079 0.082 0.078 0.079 0.077 0.077 0.078
Fish eye effect, 7.73 N/A                  
Culet through Crown Bezel, 11.66 N/A                  

Measurement as per OctoNus theory

Crown angle, 34.55 34.51 34.57 0.06     34.57 34.55 34.51 34.57        
Pavilion angle, 40.73 40.71 40.77 0.06     40.72 40.77 40.73 40.71        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 -0.00 -0.15 -0.33 -0.07 0.04 0.02 0.02
Lower girdle facets / Halves -0.03 0.14 -0.12 0.03 0.02 -0.38 -0.03 -0.20
0.19 -0.37 0.01 0.21 0.13 0.02 -0.10 0.32
Crown -0.28 0.07 0.08 0.11 -0.02 0.29 0.20 -0.33
Upper girdle facets 0.29 0.11 0.59 0.32 0.80 0.06 0.45 -0.46
-0.31 0.14 0.36 -0.34 0.22 -0.39 -0.21 -0.37
Star facets -0.32 -0.40 -0.14 -0.28 -0.41 -0.30 -0.72 -1.13

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.14 0.22, % 0.008 0.013, mm
Girdle-Table offset by table axis 0.16 0.20, % 0.009 0.011, mm
Table-Culet offset by table axis 0.24 0.23, % 0.014 0.014, mm
Girdle to table-culet line offset 0.24, % 0.014, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.821, 100%
Width-wise culet shift ratio 2.906 mm, 49.92 % 2.916 mm, 50.09 %
Lengh-wise culet shift ratio 2.918 mm, 50.14 % 2.901 mm, 49.84 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, 0.20 EX 0.72 1.00 EX
Crown painting, notches 0.1, Negligible 0.2 0.3
Pavilion painting, 0.02 EX 0.40 0.73 EX
Pavilion painting, notches 0.0, Negligible 0.1 0.2

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, 0.57 -0.04 0.52 -0.24 0.72 0.05 0.35 0.44
-0.28 0.15 0.06 0.54 0.02 0.05 0.12 0.09
Crown painting, notches 0.2 0.0 0.1 0.1 0.2 0.0 0.1 0.1
0.1 0.0 0.0 0.1 0.0 0.0 0.0 0.0
Pavilion painting, -0.03 -0.14 -0.12 -0.18 0.17 0.05 0.30 0.14
0.26 0.40 -0.03 -0.18 0.10 -0.00 -0.12 -0.32
Pavilion painting, notches 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0
0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.1

 
Cut parameters description

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