HELIUM POLISH REPORT
Brilliant

General information

Model
Expert name
Report date
Real weight, ct
Calculated weight, ct 0.73, 0.7325
Appraiser title GIA_PCT_2006
Overall cut quality E
Symmetry appraiser title N/A
Overall symmetry quality FR
Spread -0.02 ct, -2.45%
Measurements 5.773 (5.750-5.786) x 3.641 / 0.006 mm
Girdle to MIC 0.006 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.773
Crown height 0.899
Pavilion depth 2.575
Total height 3.641
Table 3.161
Culet 0.021
Girdle Bezel 0.167
Girdle Bone 0.182
Girdle Valley 0.080

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.773 5.750 5.786 0.62% N/A VG 5.786 5.781 5.766 5.773        
Crown angle, 34.51 34.38 34.68 0.30 N/A EX 34.49 34.62 34.61 34.38 34.46 34.42 34.68 34.44
Pavilion angle, 41.81 41.71 41.89 0.18 N/A EX 41.85 41.87 41.81 41.76 41.82 41.71 41.77 41.89
Total height, % 63.07       N/A                  
Crown height, % 15.58 15.47 15.71 0.24 N/A EX 15.50 15.58 15.47 15.55 15.62 15.71 15.60 15.61
Pavilion depth, % 44.60 44.36 44.87 0.51 N/A EX 44.87 44.84 44.36 44.57 44.55 44.49 44.56 44.58
Table, % 54.76 54.60 54.99 0.39 N/A EX 54.79 54.60 54.99 54.66        
Culet, % 0.36 0.28 0.41 0.13 E EX                
Girdle Bezel, % 2.89 2.65 3.25 0.59 E EX 2.71 2.65 3.25 2.97 2.84 2.87 2.92 2.89
Girdle Bone, % 3.15 2.59 3.36 0.78   VG 3.23 3.13 2.59 3.32 3.36 3.18 3.18 3.21
Girdle Valley, % 1.39 1.16 1.81 0.65 N/A EX 1.38 1.25 1.16 1.77 1.81 1.51 1.28 1.41
1.29 1.20 1.41 1.45 1.42 1.34 1.21 1.38
Star:
Upper ratio, %
54.09: 51.03: 56.82: 5.79     53.08: 54.36: 51.03: 54.22: 56.82: 52.73: 55.05: 55.40:
45.91 48.97 43.18 46.92 45.64 48.97 45.78 43.18 47.27 44.95 44.60
Star angle, 23.21 22.98 23.41 0.44   EX 23.20 23.39 23.25 23.02 23.41 22.98 23.28 23.16
Upper girdle angle, 41.71 39.92 42.49 2.57   GD 41.76 41.78 42.09 39.92 41.66 42.49 41.72 41.71
41.79 41.93 41.55 41.86 41.58 41.78 41.95 41.71
Lower girdle angle / Halves angle, 42.81 42.63 42.99 0.36   EX 42.76 42.81 42.86 42.76 42.95 42.94 42.76 42.81
42.72 42.76 42.63 42.65 42.74 42.94 42.99 42.82
Twist, 0.30 0.02 0.58 0.56   EX 0.30 0.19 0.58 0.02 0.26 0.12 0.49 0.42
Crown height, mm 0.899 0.893 0.907 0.014 N/A EX 0.895 0.899 0.893 0.897 0.902 0.907 0.900 0.901
Pavilion depth, mm 2.575 2.561 2.590 0.029 N/A EX 2.590 2.589 2.561 2.573 2.572 2.568 2.573 2.574
Table, mm 3.161 3.152 3.175 0.023 N/A EX 3.163 3.152 3.175 3.155        
Culet, mm 0.021 0.016 0.024 0.007 E EX                
Girdle Bezel, mm 0.167 0.153 0.187 0.034 E EX 0.156 0.153 0.187 0.171 0.164 0.166 0.169 0.167
Girdle Bone, mm 0.182 0.150 0.194 0.045   VG 0.186 0.181 0.150 0.192 0.194 0.183 0.183 0.185
Girdle Valley, mm 0.080 0.067 0.104 0.037 N/A EX 0.080 0.072 0.067 0.102 0.104 0.087 0.074 0.081
0.074 0.069 0.081 0.084 0.082 0.077 0.070 0.080
Fish eye effect, 13.62 N/A                  
Culet through Crown Bezel, 6.85 N/A                  

Measurement as per OctoNus theory

Crown angle, 34.51 34.41 34.65 0.24     34.48 34.52 34.65 34.41        
Pavilion angle, 41.81 41.79 41.84 0.05     41.84 41.79 41.79 41.83        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 -0.14 0.42 -1.05 -0.33 -0.23 -0.66 -0.12
Lower girdle facets / Halves -1.62 0.27 -1.87 -0.26 -0.34 -2.93 -2.44 -0.51
-1.92 0.81 -0.31 1.34 -0.48 0.52 -0.35 0.81
Crown 0.30 0.05 -0.16 -1.03 -0.59 -0.34 -0.16 0.30
Upper girdle facets -0.89 -0.13 -0.28 1.75 -0.75 -2.34 -2.02 -0.88
-1.23 0.21 0.04 0.12 -0.30 -0.08 -0.13 -0.67
Star facets 1.16 -0.40 -1.33 -2.14 -1.15 -1.24 0.75 0.48

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.18 0.21, % 0.011 0.012, mm
Girdle-Table offset by table axis 0.37 0.19, % 0.021 0.011, mm
Table-Culet offset by table axis 0.19 0.23, % 0.011 0.013, mm
Girdle to table-culet line offset 0.19, % 0.011, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.773, 100%
Width-wise culet shift ratio 2.885 mm, 49.97 % 2.901 mm, 50.24 %
Lengh-wise culet shift ratio 2.888 mm, 50.02 % 2.879 mm, 49.86 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -0.22 N/A -1.90 3.21 N/A
Crown painting, notches 0.1, Negligible 0.5 0.9
Pavilion painting, -0.59 Painting N/A -2.00 3.88 N/A
Pavilion painting, notches 0.2, Very small 0.5 1.0

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -1.19 0.18 -0.33 -1.90 -0.60 1.31 -0.99 0.29
-0.64 -0.55 0.39 -0.29 -0.14 0.39 -0.43 0.97
Crown painting, notches 0.3 0.0 0.1 0.5 0.2 0.3 0.3 0.1
0.2 0.1 0.1 0.1 0.0 0.1 0.1 0.3
Pavilion painting, -1.62 -0.41 -1.73 0.68 -0.76 1.88 -1.39 0.18
-1.58 -1.03 -0.08 -2.00 0.18 -0.64 -0.23 -0.81
Pavilion painting, notches 0.4 0.1 0.5 0.2 0.2 0.5 0.4 0.0
0.4 0.3 0.0 0.5 0.0 0.2 0.1 0.2

 
Cut parameters description

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