Standard report for brilliant

General information

Model Simple
Expert name Makoed A.G.
Report date 18.04.2008
Real weight, ct
Calculated weight, ct 0.73, 0.7291
Appraiser title GIA_PCTG_StarCul
Overall cut quality E
Symmetry appraiser title Internal
Overall symmetry quality VG
Spread -0.02 ct, -2.96%
AGS Spread N/A ct, N/A%
Measurements 5.763 (5.755-5.769) x 3.590 / 0.002 mm
Girdle to MIC 0.002 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.763
Crown height 0.907
Pavilion depth 2.511
Total height 3.590
Table 3.300
Culet 0.024
Girdle Bezel 0.171
Girdle Bone 0.171
Girdle Valley 0.071

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.763 5.755 5.769 0.24% E EX 5.765 5.763 5.763 5.765        
Crown angle, 36.32 36.27 36.40 0.13 Grading EX 36.29 36.33 36.34 36.31 36.33 36.27 36.40 36.28
Pavilion angle, 41.18 41.11 41.26 0.15 Grading EX 41.15 41.19 41.26 41.18 41.21 41.23 41.13 41.11
Total height, % 62.29       E                  
Crown height, % 15.74 15.62 15.80 0.18 E EX 15.62 15.67 15.74 15.76 15.79 15.77 15.78 15.80
Pavilion depth, % 43.58 43.44 43.70 0.25 N/A EX 43.68 43.70 43.65 43.44 43.48 43.61 43.52 43.55
Table, % 57.26 57.18 57.34 0.17 Grading EX 57.34 57.24 57.27 57.18        
Culet, % 0.41 0.37 0.44 0.07 E EX                
Girdle Bezel, % 2.96 2.89 3.09 0.20 E EX 2.99 2.91 2.91 3.09 3.00 2.89 2.96 2.95
Girdle Bone, % 2.97 2.85 3.27 0.42   EX 3.03 2.99 3.27 2.94 2.85 2.91 2.89 2.85
Girdle Valley, % 1.23 1.09 1.46 0.36 E EX 1.22 1.18 1.24 1.24 1.38 1.46 1.27 1.26
1.23 1.09 1.24 1.23 1.23 1.14 1.17 1.16
Star:
Upper ratio, %
54.74: 54.38: 55.16: 0.78     54.44: 54.89: 54.92: 54.78: 55.16: 54.38: 54.41: 54.92:
45.26 45.62 44.84 45.56 45.11 45.08 45.22 44.84 45.62 45.59 45.08
Star angle, 24.02 23.86 24.12 0.26   EX 23.86 24.08 24.10 24.03 24.00 23.98 24.12 24.00
Upper girdle angle, 43.82 43.35 44.42 1.07   VG 43.45 43.65 43.98 44.16 43.35 43.39 44.14 44.42
43.81 44.17 43.62 43.59 43.56 43.93 43.76 44.14
Lower girdle angle / Halves angle, 42.29 42.18 42.37 0.20   EX 42.26 42.31 42.33 42.37 42.34 42.31 42.33 42.35
42.33 42.37 42.34 42.25 42.18 42.20 42.19 42.24
Twist, 0.36 0.09 0.73 0.63   EX 0.38 0.73 0.30 0.35 0.09 0.46 0.25 0.34
Crown height, mm 0.907 0.900 0.911 0.010 E EX 0.900 0.903 0.907 0.908 0.910 0.909 0.910 0.911
Pavilion depth, mm 2.511 2.504 2.518 0.015 N/A EX 2.517 2.518 2.515 2.504 2.506 2.513 2.508 2.510
Table, mm 3.300 3.295 3.305 0.010 Grading EX 3.305 3.299 3.300 3.295        
Culet, mm 0.024 0.021 0.025 0.004 E EX                
Girdle Bezel, mm 0.171 0.166 0.178 0.012 E EX 0.173 0.168 0.167 0.178 0.173 0.166 0.170 0.170
Girdle Bone, mm 0.171 0.164 0.188 0.024   EX 0.175 0.172 0.188 0.169 0.164 0.168 0.167 0.164
Girdle Valley, mm 0.071 0.063 0.084 0.021 E EX 0.070 0.068 0.071 0.072 0.080 0.084 0.073 0.072
0.071 0.063 0.071 0.071 0.071 0.066 0.067 0.067
Fish eye effect, 9.55 N/A                  
Culet through Crown Bezel, 7.06 N/A                  

Measurement as per OctoNus theory

Crown angle, 36.32 36.29 36.37 0.07     36.31 36.30 36.37 36.29        
Pavilion angle, 41.18 41.15 41.21 0.06     41.18 41.21 41.19 41.15        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 -0.13 -0.05 -0.05 0.04 -0.08 0.09 0.01
Lower girdle facets / Halves 0.08 -0.10 0.17 0.13 0.02 -0.36 0.10 -0.44
0.13 -0.04 0.33 -0.15 0.04 -0.27 -0.16 0.08
Crown 0.38 0.60 0.25 0.29 0.13 0.38 0.34 0.35
Upper girdle facets -0.33 0.79 0.67 0.29 -0.22 0.96 0.65 -0.66
-0.22 0.06 0.10 0.77 -0.03 0.04 -0.12 -0.32
Star facets 1.43 1.02 0.78 0.24 0.61 0.56 1.02 0.62

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.20 0.22, % 0.012 0.013, mm
Girdle-Table offset by table axis 0.11 0.20, % 0.006 0.011, mm
Table-Culet offset by table axis 0.19 0.24, % 0.011 0.014, mm
Girdle to table-culet line offset 0.19, % 0.011, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.763, 100%
Width-wise culet shift ratio 2.875 mm, 49.89 % 2.890 mm, 50.14 %
Lengh-wise culet shift ratio 2.884 mm, 50.05 % 2.879 mm, 49.95 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -0.09 EX 0.79 1.49 EX
Crown painting, notches 0.0, Negligible 0.2 0.4
Pavilion painting, 0.12 EX 0.48 0.65 EX
Pavilion painting, notches 0.0, Negligible 0.1 0.2

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -0.70 -0.19 0.07 -0.04 -0.47 -0.66 0.36 0.79
-0.35 0.32 -0.28 -0.43 -0.37 0.31 -0.47 0.70
Crown painting, notches 0.2 0.1 0.0 0.0 0.1 0.2 0.1 0.2
0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2
Pavilion painting, 0.08 -0.03 0.30 -0.17 0.07 0.30 0.15 0.48
0.09 -0.04 0.42 0.25 -0.05 0.27 -0.17 -0.08
Pavilion painting, notches 0.0 0.0 0.1 0.0 0.0 0.1 0.0 0.1
0.0 0.0 0.1 0.1 0.0 0.1 0.0 0.0

 
Cut parameters description

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