HELIUM POLISH REPORT
Brilliant

General information

Model Simple
Expert name Makoed A.G.
Report date 29.11.2006
Real weight, ct
Calculated weight, ct 0.54, 0.5484
Appraiser title GIA_PCT_2006
Overall cut quality V
Symmetry appraiser title Internal
Overall symmetry quality GD
Spread 0.01 ct, 1.33%
Measurements 5.287 (5.277-5.296) x 3.223 / 0.008 mm
Girdle to MIC 0.008 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.287
Crown height 0.813
Pavilion depth 2.245
Total height 3.223
Table 2.876
Culet 0.129
Girdle Bezel 0.164
Girdle Bone 0.176
Girdle Valley 0.089

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.287 5.277 5.296 0.36% N/A EX 5.281 5.296 5.288 5.293        
Crown angle, 34.02 33.45 34.23 0.78 Grading VG 34.05 34.12 34.14 33.45 34.06 34.08 34.23 34.05
Pavilion angle, 40.56 40.44 40.66 0.21 Grading EX 40.44 40.53 40.55 40.55 40.55 40.64 40.60 40.66
Total height, % 60.97       N/A                  
Crown height, % 15.38 15.06 15.68 0.62 N/A EX 15.68 15.64 15.41 15.09 15.06 15.16 15.35 15.67
Pavilion depth, % 42.46 41.89 42.83 0.94 N/A VG 41.89 42.30 42.49 42.54 42.68 42.83 42.51 42.45
Table, % 54.40 53.99 54.72 0.73 Grading EX 54.22 54.72 54.66 53.99        
Culet, % 2.44 2.09 2.90 0.81 V EX                
Girdle Bezel, % 3.11 2.78 3.35 0.57 E EX 3.32 2.96 3.07 3.35 3.24 2.98 3.15 2.78
Girdle Bone, % 3.33 2.98 3.76 0.78   VG 3.76 2.98 3.29 3.39 3.49 3.27 3.10 3.36
Girdle Valley, % 1.68 1.26 1.99 0.74 N/A EX 1.99 1.77 1.26 1.66 1.53 1.67 1.84 1.89
1.73 1.64 1.53 1.82 1.65 1.37 1.57 1.93
Star:
Upper ratio, %
49.52: 47.88: 50.88: 3.00     47.88: 48.63: 50.26: 50.29: 49.93: 48.73: 50.88: 49.51:
50.48 52.12 49.12 52.12 51.37 49.74 49.71 50.07 51.27 49.12 50.49
Star angle, 21.96 21.31 22.26 0.95   EX 22.10 21.68 21.31 22.03 22.16 22.04 22.26 22.09
Upper girdle angle, 39.50 38.20 40.74 2.54   GD 38.68 39.37 38.20 38.21 40.00 39.97 39.07 39.53
39.25 39.27 39.98 39.72 40.55 40.74 39.88 39.63
Lower girdle angle / Halves angle, 41.69 41.50 42.35 0.85   EX 41.52 41.54 42.35 42.19 41.63 41.55 41.59 41.54
41.66 41.69 41.69 41.62 41.63 41.76 41.63 41.50
Twist, 0.71 0.05 1.73 1.68   VG 0.33 1.07 0.05 0.37 0.63 0.82 0.66 1.73
Crown height, mm 0.813 0.796 0.829 0.033 N/A EX 0.829 0.827 0.815 0.798 0.796 0.802 0.811 0.828
Pavilion depth, mm 2.245 2.215 2.264 0.050 N/A VG 2.215 2.236 2.246 2.249 2.256 2.264 2.247 2.244
Table, mm 2.876 2.854 2.893 0.039 Grading EX 2.867 2.893 2.890 2.854        
Culet, mm 0.129 0.110 0.153 0.043 V EX                
Girdle Bezel, mm 0.164 0.147 0.177 0.030 E EX 0.175 0.156 0.162 0.177 0.171 0.157 0.167 0.147
Girdle Bone, mm 0.176 0.157 0.199 0.041   VG 0.199 0.157 0.174 0.179 0.184 0.173 0.164 0.178
Girdle Valley, mm 0.089 0.066 0.105 0.039 N/A EX 0.105 0.094 0.066 0.088 0.081 0.089 0.097 0.100
0.092 0.087 0.081 0.096 0.087 0.072 0.083 0.102
Fish eye effect, 8.74 N/A                  
Culet through Crown Bezel, 9.19 N/A                  

Measurement as per OctoNus theory

Crown angle, 34.02 33.75 34.18 0.43     34.05 34.10 34.18 33.75        
Pavilion angle, 40.56 40.49 40.60 0.11     40.49 40.58 40.57 40.60        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 0.44 0.06 0.70 0.13 -0.25 -0.84 -0.82
Lower girdle facets / Halves -0.41 -0.45 3.96 -3.80 -0.32 -0.20 -0.33 -0.21
-0.18 -0.34 -0.57 -0.50 -0.66 -0.46 -0.76 -0.49
Crown 0.33 -0.62 0.11 1.07 -0.50 0.57 -0.17 0.91
Upper girdle facets -2.71 0.21 -3.87 3.01 -1.23 -0.43 -0.78 -0.05
-2.55 1.78 -0.31 1.10 0.08 0.05 -0.19 0.20
Star facets 0.15 0.29 2.24 1.35 2.09 1.73 0.92 1.19

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.73 0.24, % 0.039 0.013, mm
Girdle-Table offset by table axis 0.42 0.21, % 0.022 0.011, mm
Table-Culet offset by table axis 0.63 0.25, % 0.033 0.013, mm
Girdle to table-culet line offset 0.63, % 0.033, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.287, 100%
Width-wise culet shift ratio 2.612 mm, 49.40 % 2.669 mm, 50.49 %
Lengh-wise culet shift ratio 2.665 mm, 50.41 % 2.624 mm, 49.63 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -1.09 Painting EX -3.25 4.75 EX
Crown painting, notches 0.3, Very small 0.9 1.3
Pavilion painting, 0.45 Digging EX 3.86 4.89 EX
Pavilion painting, notches 0.1, Very small 1.0 1.3

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -3.04 -0.83 -3.25 -2.90 -1.34 1.50 -1.86 -0.45
-2.04 -1.21 -0.88 -1.27 0.25 0.87 -1.11 0.13
Crown painting, notches 0.8 0.2 0.9 0.8 0.4 0.4 0.5 0.1
0.5 0.3 0.2 0.3 0.1 0.2 0.3 0.0
Pavilion painting, -0.41 0.89 3.52 3.86 -0.38 0.90 -1.03 0.34
-0.30 0.08 -0.31 -0.34 0.18 -0.35 0.06 0.49
Pavilion painting, notches 0.1 0.2 0.9 1.0 0.1 0.2 0.3 0.1
0.1 0.0 0.1 0.1 0.0 0.1 0.0 0.1

 
Cut parameters description

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