HELIUM POLISH REPORT
Brilliant

General information

Model Simple
Expert name Makoed A.G.
Report date 07.07.2007
Real weight, ct
Calculated weight, ct 0.37, 0.3756
Appraiser title GIA_PCTG_StarCul
Overall cut quality G
Symmetry appraiser title Internal
Overall symmetry quality FR
Spread 0.03 ct, 8.38%
AGS Spread 0.03 ct, 8.08%
Measurements 4.777 (4.764-4.794) x 2.717 / 0.018 mm
Girdle to MIC 0.018 mm
Extra Facet / Nat Yes (2)
 

Average values, mm

Diameter 4.777
Crown height 0.543
Pavilion depth 2.037
Total height 2.717
Table 3.060
Culet 0.025
Girdle Bezel 0.136
Girdle Bone 0.158
Girdle Valley 0.073

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 4.777 4.764 4.794 0.62% E VG 4.783 4.772 4.775 4.775        
Crown angle, 32.24 31.05 32.55 1.50 Grading VG 32.41 32.54 32.14 31.05 32.44 32.24 32.52 32.55
Pavilion angle, 40.62 39.63 41.47 1.84 Grading GD 40.33 40.29 39.63 40.12 40.71 41.36 41.47 41.04
Total height, % 56.88       V                  
Crown height, % 11.37 10.64 12.34 1.71 V GD 12.34 12.14 11.54 10.84 10.64 10.64 11.16 11.64
Pavilion depth, % 42.64 41.67 43.72 2.05 N/A GD 41.67 42.24 41.95 42.85 43.48 43.72 43.06 42.18
Table, % 64.05 63.84 64.15 0.31 Grading EX 64.07 64.15 64.14 63.84        
Culet, % 0.53 0.35 0.63 0.28 E EX                
Girdle Bezel, % 2.84 2.39 3.40 1.01 E GD 2.87 2.39 3.40 3.19 2.72 2.47 2.60 3.06
Girdle Bone, % 3.30 2.94 3.80 0.86   VG 2.99 3.54 3.44 3.07 3.80 2.94 3.59 3.05
Girdle Valley, % 1.53 1.16 1.98 0.82 E EX 1.43 1.16 1.38 1.98 1.96 1.76 1.68 1.35
1.63 1.34 1.27 1.17 1.44 1.70 1.73 1.54
Star:
Upper ratio, %
58.39: 54.01: 63.15: 9.14     54.65: 57.84: 60.63: 58.79: 63.15: 60.26: 57.78: 54.01:
41.61 45.99 36.85 45.35 42.16 39.37 41.21 36.85 39.74 42.22 45.99
Star angle, 18.79 17.63 19.85 2.21   VG 19.32 19.37 19.22 18.60 17.63 18.30 18.04 19.85
Upper girdle angle, 39.91 38.83 41.11 2.28   VG 39.58 39.28 39.61 40.30 40.18 39.70 39.31 40.03
40.83 38.83 41.11 40.21 40.92 39.53 39.39 39.82
Lower girdle angle / Halves angle, 41.53 40.54 42.44 1.91   VG 41.08 41.11 41.06 40.54 40.61 40.95 41.30 41.52
41.79 42.22 42.39 42.44 42.24 42.04 41.80 41.35
Twist, 1.38 0.03 3.61 3.58   FR 0.04 0.73 0.54 2.00 3.61 0.88 0.03 3.19
Crown height, mm 0.543 0.508 0.590 0.082 V GD 0.590 0.580 0.551 0.518 0.508 0.508 0.533 0.556
Pavilion depth, mm 2.037 1.990 2.088 0.098 N/A GD 1.990 2.018 2.004 2.047 2.077 2.088 2.057 2.015
Table, mm 3.060 3.050 3.064 0.015 Grading EX 3.061 3.064 3.064 3.050        
Culet, mm 0.025 0.017 0.030 0.013 E EX                
Girdle Bezel, mm 0.136 0.114 0.162 0.048 E GD 0.137 0.114 0.162 0.153 0.130 0.118 0.124 0.146
Girdle Bone, mm 0.158 0.140 0.181 0.041   VG 0.143 0.169 0.164 0.147 0.181 0.140 0.171 0.146
Girdle Valley, mm 0.073 0.055 0.095 0.039 E EX 0.068 0.055 0.066 0.095 0.094 0.084 0.080 0.065
0.078 0.064 0.060 0.056 0.069 0.081 0.083 0.074
Fish eye effect, 3.36 N/A                  
Culet through Crown Bezel, 25.30 N/A                  

Measurement as per OctoNus theory

Crown angle, 32.24 31.80 32.42 0.62     32.42 32.39 32.33 31.80        
Pavilion angle, 40.62 40.52 40.82 0.31     40.52 40.82 40.55 40.58        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 0.09 0.15 1.58 1.30 0.36 0.11 0.03
Lower girdle facets / Halves -0.16 2.15 -1.28 0.91 1.13 1.88 1.93 1.72
1.40 1.65 1.33 0.71 0.27 0.38 -0.13 -0.17
Crown 0.04 0.81 -0.38 -0.42 -2.31 1.24 0.08 3.22
Upper girdle facets -1.33 2.29 -1.24 0.26 -1.41 0.73 -1.26 0.63
-3.73 5.48 0.44 3.01 -0.25 5.07 1.50 0.48
Star facets -0.96 -1.59 -0.22 -1.92 0.17 1.45 0.91 1.61

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 1.52 0.26, % 0.073 0.012, mm
Girdle-Table offset by table axis 1.24 0.23, % 0.059 0.011, mm
Table-Culet offset by table axis 1.83 0.27, % 0.087 0.013, mm
Girdle to table-culet line offset 1.83, % 0.087, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 4.777, 100%
Width-wise culet shift ratio 2.427 mm, 50.81 % 2.356 mm, 49.32 %
Lengh-wise culet shift ratio 2.341 mm, 49.00 % 2.434 mm, 50.94 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -1.58 Painting EX -4.24 3.91 EX
Crown painting, notches 0.4, Small 1.1 1.0
Pavilion painting, -0.30 EX -2.07 3.04 EX
Pavilion painting, notches 0.1, Negligible 0.6 0.8

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -1.37 -1.48 -2.05 -0.65 -1.03 -1.14 -0.84 -2.94
-1.42 -4.24 -0.80 -2.93 -0.33 -1.85 -1.72 -0.43
Crown painting, notches 0.4 0.4 0.5 0.2 0.3 0.3 0.2 0.8
0.4 1.1 0.2 0.8 0.1 0.5 0.5 0.1
Pavilion painting, -0.16 -2.07 -1.37 -0.75 0.98 -0.30 0.35 -0.41
0.10 -1.29 0.97 -0.60 0.16 -0.35 -0.16 0.17
Pavilion painting, notches 0.0 0.6 0.4 0.2 0.3 0.1 0.1 0.1
0.0 0.3 0.3 0.2 0.0 0.1 0.0 0.0

 
Cut parameters description

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