HELIUM POLISH REPORT
Brilliant

General information

Model Sarin Sample
Expert name
Report date
Real weight, ct
Calculated weight, ct 0.75, 0.7486
Appraiser title GIA_PCT_2006
Overall cut quality V
Symmetry appraiser title N/A
Overall symmetry quality GD
Spread -0.01 ct, -1.29%
Measurements 5.848 (5.833-5.862) x 3.632 / 0.005 mm
Girdle to MIC 0.005 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.848
Crown height 0.865
Pavilion depth 2.604
Total height 3.632
Table 3.319
Culet N/A
Girdle Bezel 0.163
Girdle Bone 0.188
Girdle Valley 0.082

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.848 5.833 5.862 0.50% N/A EX 5.860 5.841 5.844 5.856        
Crown angle, 34.39 34.27 34.52 0.25 N/A EX 34.41 34.36 34.38 34.51 34.38 34.27 34.28 34.52
Pavilion angle, 41.75 41.59 41.88 0.30 N/A EX 41.66 41.69 41.73 41.77 41.80 41.88 41.85 41.59
Total height, % 62.11       N/A                  
Crown height, % 14.80 14.53 15.09 0.56 N/A EX 14.64 14.53 14.88 15.09 15.07 14.90 14.60 14.67
Pavilion depth, % 44.53 44.17 45.14 0.97 N/A VG 45.14 44.62 44.38 44.17 44.18 44.37 44.64 44.75
Table, % 56.75 56.59 56.92 0.33 N/A EX 56.92 56.59 56.73 56.77        
Culet, % N/A 0.03 0.22 0.19 N/A EX                
Girdle Bezel, % 2.79 2.38 2.96 0.57 E EX 2.38 2.96 2.89 2.85 2.86 2.84 2.88 2.69
Girdle Bone, % 3.21 2.94 3.45 0.50   EX 3.16 3.15 3.25 3.27 2.94 3.45 3.23 3.21
Girdle Valley, % 1.40 1.19 1.70 0.51 N/A EX 1.40 1.48 1.41 1.55 1.30 1.44 1.46 1.19
1.39 1.25 1.27 1.56 1.70 1.31 1.44 1.31
Star:
Upper ratio, %
55.31: 52.56: 56.88: 4.32     55.24: 55.78: 52.56: 54.13: 55.82: 56.88: 56.09: 56.03:
44.69 47.44 43.12 44.76 44.22 47.44 45.87 44.18 43.12 43.91 43.97
Star angle, 22.54 22.15 22.87 0.72   EX 22.29 22.15 22.41 22.69 22.73 22.87 22.72 22.46
Upper girdle angle, 41.14 40.22 41.93 1.71   VG 41.25 41.45 41.93 41.64 41.01 41.04 41.09 41.04
41.47 41.11 40.22 41.27 40.71 41.03 40.91 41.11
Lower girdle angle / Halves angle, 42.70 42.45 42.96 0.51   EX 42.45 42.60 42.61 42.69 42.55 42.69 42.85 42.86
42.90 42.96 42.80 42.86 42.68 42.66 42.49 42.51
Twist, 0.78 0.03 1.42 1.39   VG 1.29 0.81 0.16 0.56 0.76 0.03 1.42 1.19
Crown height, mm 0.865 0.850 0.882 0.033 N/A EX 0.856 0.850 0.870 0.882 0.882 0.871 0.854 0.858
Pavilion depth, mm 2.604 2.583 2.640 0.057 N/A VG 2.640 2.610 2.596 2.583 2.584 2.595 2.611 2.617
Table, mm 3.319 3.310 3.329 0.019 N/A EX 3.329 3.310 3.317 3.320        
Culet, mm N/A 0.002 0.013 0.011 N/A EX                
Girdle Bezel, mm 0.163 0.139 0.173 0.034 E EX 0.139 0.173 0.169 0.167 0.167 0.166 0.168 0.157
Girdle Bone, mm 0.188 0.172 0.202 0.029   EX 0.185 0.184 0.190 0.191 0.172 0.202 0.189 0.187
Girdle Valley, mm 0.082 0.070 0.099 0.030 N/A EX 0.082 0.086 0.082 0.091 0.076 0.084 0.085 0.070
0.081 0.073 0.074 0.091 0.099 0.077 0.084 0.077
Fish eye effect, 12.24 N/A                  
Culet through Crown Bezel, 9.94 N/A                  

Measurement as per OctoNus theory

Crown angle, 34.39 34.32 34.51 0.20     34.40 34.32 34.33 34.51        
Pavilion angle, 41.75 41.68 41.79 0.11     41.73 41.79 41.79 41.68        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 -2.06 -0.27 -0.73 -0.35 -1.02 0.27 0.32
Lower girdle facets / Halves -2.40 -0.74 -2.23 -0.48 -2.14 0.10 -0.66 -0.35
1.28 -0.59 -1.08 0.25 -0.99 -0.88 -0.95 0.75
Crown -1.29 -1.25 -0.43 -1.29 -1.11 -0.99 -1.14 -0.87
Upper girdle facets -1.93 0.10 -1.14 0.15 -1.16 0.14 -1.32 0.23
-1.03 -0.04 -3.11 0.43 -2.57 0.92 -2.86 0.49
Star facets -0.34 -0.66 -0.59 -0.58 0.09 -0.57 -0.41 -0.99

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.55 0.21, % 0.032 0.012, mm
Girdle-Table offset by table axis 0.48 0.18, % 0.028 0.011, mm
Table-Culet offset by table axis 1.02 0.23, % 0.060 0.013, mm
Girdle to table-culet line offset 1.02, % 0.060, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.848, 100%
Width-wise culet shift ratio 2.891 mm, 49.44 % 2.969 mm, 50.76 %
Lengh-wise culet shift ratio 2.924 mm, 49.99 % 2.920 mm, 49.93 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -1.10 Painting N/A -2.12 2.23 N/A
Crown painting, notches 0.3, Very small 0.6 0.6
Pavilion painting, -0.45 Painting N/A -2.40 4.03 N/A
Pavilion painting, notches 0.1, Very small 0.6 1.1

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -0.63 -1.36 0.11 -0.58 -0.73 -1.43 -0.04 -1.34
0.08 -0.95 -2.12 -1.57 -1.43 -1.79 -1.99 -1.79
Crown painting, notches 0.2 0.4 0.0 0.2 0.2 0.4 0.0 0.4
0.0 0.3 0.6 0.4 0.4 0.5 0.5 0.5
Pavilion painting, -2.40 -1.32 -0.17 0.21 -1.87 -0.83 0.06 -0.00
1.63 -0.42 -0.06 0.03 -1.26 1.20 -1.27 -0.75
Pavilion painting, notches 0.6 0.4 0.0 0.1 0.5 0.2 0.0 0.0
0.4 0.1 0.0 0.0 0.3 0.3 0.3 0.2

 
Cut parameters description

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