DIAMCALC POLISH REPORT
Brilliant

General information

Model Sample Helium Brilliant
Expert name Sample Expert Name
Report date 06.09.2006
Real weight, ct 0.37
Calculated weight, ct 0.37, 0.3764
Spread 0.03 ct, 8.44%
Measurements, mm 4.778 (4.765-4.792) x 2.722 / 0.019
Appraiser title AGS_2005
Overall cut quality 3
Overall symmetry quality PR
Extra Facet / Nat Yes (2)
Girdle to MIC, mm 0.019
 

Average values

Total height, mm 2.722
Crown height, mm 0.544
Pavilion depth, mm 2.041
Table, mm 3.059
Culet, mm 0.027
Girdle Bezel, mm 0.136
Girdle Bone, mm 0.158
Girdle Valley, mm 0.074

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 4.778 4.765 4.792 0.57% N/A EX 4.785 4.774 4.777 4.777        
Crown angle, ° 32.25 31.11 32.55 1.44 N/A VG 32.50 32.51 32.16 31.11 32.45 32.24 32.47 32.55
Pavilion angle, ° 40.68 39.68 41.53 1.86 N/A VG 40.38 40.33 39.68 40.18 40.78 41.43 41.53 41.10
Total height, % 56.96       N/A                  
Crown height, % 11.38 10.61 12.35 1.75 N/A VG 12.35 12.15 11.58 10.84 10.67 10.61 11.15 11.66
Pavilion depth, % 42.72 41.72 43.77 2.05 N/A GD 41.72 42.30 41.99 42.92 43.60 43.77 43.17 42.28
Table, % 64.03 63.82 64.12 0.29 N/A EX 64.06 64.11 64.12 63.82        
Culet, % 0.57 0.39 0.68 0.28 0 EX                
Girdle Bezel, % 2.84 2.41 3.40 0.98 0 EX 2.87 2.41 3.40 3.16 2.71 2.50 2.62 3.06
Girdle Bone, % 3.31 3.02 3.71 0.69   EX 3.04 3.55 3.45 3.08 3.71 3.04 3.60 3.02
Girdle Valley, % 1.55 1.22 1.98 0.75 0 EX 1.43 1.25 1.41 1.96 1.98 1.75 1.68 1.35
1.64 1.33 1.31 1.22 1.42 1.73 1.71 1.55
Star:
Upper ratio, %
58.29: 53.81: 62.79: 8.98     54.81: 58.07: 60.72: 58.81: 62.79: 59.87: 57.44: 53.81:
41.71 46.19 37.21 45.19 41.93 39.28 41.19 37.21 40.13 42.56 46.19
Star angle, ° 18.74 17.50 19.77 2.27   GD 19.29 19.45 19.17 18.52 17.50 18.26 17.98 19.77
Upper girdle angle, ° 39.95 39.01 41.04 2.03   GD 39.61 39.33 39.61 40.40 40.20 39.76 39.34 40.04
40.92 39.01 41.04 40.15 40.97 39.58 39.40 39.88
Lower girdle angle / Halves angle, ° 41.57 40.59 42.49 1.90   VG 41.13 41.12 41.08 40.59 40.64 41.00 41.35 41.58
41.83 42.28 42.44 42.49 42.29 42.07 41.84 41.40
Twist, ° 1.49 0.17 3.62 3.45   VG 0.40 0.61 0.58 2.20 3.62 0.91 0.17 3.44
Crown height, mm 0.544 0.507 0.590 0.083     0.590 0.581 0.553 0.518 0.510 0.507 0.533 0.557
Pavilion depth, mm 2.041 1.993 2.091 0.098     1.993 2.021 2.006 2.051 2.083 2.091 2.063 2.020
Table, mm 3.059 3.050 3.064 0.014 3.061 3.063 3.064 3.050        
Culet, mm 0.027 0.019 0.032 0.014                
Girdle Bezel, mm 0.136 0.115 0.162 0.047 0.137 0.115 0.162 0.151 0.129 0.120 0.125 0.146
Girdle Bone, mm 0.158 0.144 0.177 0.033   0.145 0.170 0.165 0.147 0.177 0.145 0.172 0.144
Girdle Valley, mm 0.074 0.058 0.094 0.036 0.069 0.060 0.067 0.094 0.094 0.084 0.080 0.064
0.078 0.064 0.062 0.058 0.068 0.083 0.082 0.074
Fish eye effect, ° 3.62 N/A                  
Culet through Crown Bezel, ° 25.18 N/A                  

Measurement as per OctoNus theory

Crown angle, ° 32.25 31.83 32.48 0.65     32.48 32.38 32.31 31.83        
Pavilion angle, ° 40.68 40.58 40.88 0.30     40.58 40.88 40.60 40.64        

 

 
Girdle center Culet center Table center

Offset by table axis

Girdle-Culet 1.50 ± 0.26, % 0.072 ± 0.012, mm
Girdle-Table 1.28 ± 0.23, % 0.061 ± 0.011, mm
Table-Culet 1.82 ± 0.27, % 0.087 ± 0.013, mm

Azimuths deviation from ideal

1

2

3

4

5

6

7

8

Pavilion, ° 0.00 0.55 0.58 2.11 1.66 0.72 0.62 0.04
Lower girdle facets / Pavilion Halves, ° 0.21 2.48 -0.93 1.17 1.50 2.16 2.20 2.02
1.77 1.97 1.67 1.02 0.54 0.73 0.23 0.19
Crown, ° 0.40 1.17 0.00 -0.09 -1.96 1.63 0.45 3.48
Upper girdle facets, ° -1.00 2.64 -0.95 0.51 -1.19 1.08 -0.93 0.98
-3.40 5.76 0.79 3.40 0.07 5.52 1.89 0.83
Star facets, ° -0.73 -1.25 0.07 -1.76 0.57 1.71 1.36 2.03

Paint / Dug

Avg

Max

Type

1

2

3

4

5

6

7

8

Crown painting, ° -1.59 -4.13 Painting -1.40 -1.47 -2.12 -0.51 -1.20 -1.17 -0.84 -2.94
-1.44 -4.13 -0.84 -2.95 -0.38 -2.04 -1.58 -0.43
Crown painting, notches 0.4, Small 1.1 0.4 0.4 0.6 0.1 0.3 0.3 0.2 0.8
0.4 1.1 0.2 0.8 0.1 0.5 0.4 0.1
Pavilion painting, ° -0.28 -1.92 0.21 -1.92 -1.49 -0.59 0.92 -0.04 0.09 -0.36
0.11 -1.25 0.96 -0.40 -0.07 -0.69 0.19 -0.19
Pavilion painting, notches 0.1, Absent 0.5 0.1 0.5 0.4 0.2 0.2 0.0 0.0 0.1
0.0 0.3 0.3 0.1 0.0 0.2 0.1 0.0

 
Cut parameters description

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