Standard report for brilliant

General information

Model st3
Expert name Makoed A.G.
Report date 09.12.2007
Real weight, ct
Calculated weight, ct 0.71, 0.7095
Appraiser title GIA_PCTG_StarCul
Overall cut quality V
Symmetry appraiser title Internal
Overall symmetry quality EX
Spread -0.01 ct, -2.03%
AGS Spread -0.02 ct, -2.35%
Measurements 5.727 (5.720-5.739) x 3.509 / 0.018 mm
Girdle to MIC 0.018 mm
Extra Facet / Nat No
 

Average values, mm

Diameter 5.727
Crown height 0.895
Pavilion depth 2.427
Total height 3.509
Table 3.280
Culet 0.023
Girdle Bezel 0.187
Girdle Bone 0.180
Girdle Valley 0.086

 

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 5.727 5.720 5.739 0.34% E EX 5.722 5.731 5.730 5.728        
Crown angle, 36.15 35.96 36.48 0.53 Grading EX 36.05 35.96 36.04 36.29 36.10 36.18 36.48 36.08
Pavilion angle, 40.40 40.26 40.55 0.29 Grading EX 40.51 40.37 40.33 40.26 40.34 40.36 40.55 40.50
Total height, % 61.26       E                  
Crown height, % 15.62 15.41 15.80 0.39 E EX 15.62 15.80 15.78 15.74 15.56 15.41 15.60 15.43
Pavilion depth, % 42.38 42.13 42.63 0.50 N/A EX 42.30 42.46 42.34 42.13 42.34 42.34 42.63 42.52
Table, % 57.26 57.13 57.40 0.27 Grading EX 57.13 57.26 57.27 57.40        
Culet, % 0.41 0.30 0.50 0.20 E EX                
Girdle Bezel, % 3.26 3.00 3.52 0.51 E EX 3.34 3.00 3.13 3.40 3.37 3.52 3.04 3.32
Girdle Bone, % 3.14 2.80 3.35 0.55   EX 3.20 3.27 3.35 3.15 2.92 3.16 2.80 3.32
Girdle Valley, % 1.49 1.28 1.85 0.57 E EX 1.39 1.32 1.45 1.60 1.45 1.73 1.55 1.35
1.46 1.50 1.61 1.36 1.28 1.37 1.63 1.85
Star:
Upper ratio, %
52.77: 52.07: 53.86: 1.80     53.19: 52.69: 53.86: 52.82: 52.07: 52.10: 52.49: 52.95:
47.23 47.93 46.14 46.81 47.31 46.14 47.18 47.93 47.90 47.51 47.05
Star angle, 23.57 23.19 24.02 0.83   EX 23.69 23.19 23.65 24.02 23.42 23.48 23.37 23.70
Upper girdle angle, 43.32 42.90 43.72 0.82   EX 43.04 42.94 43.32 43.41 43.43 43.59 42.90 42.92
43.51 43.72 43.55 43.41 43.08 43.55 43.41 43.43
Lower girdle angle / Halves angle, 41.51 41.32 41.64 0.31   EX 41.59 41.55 41.41 41.39 41.46 41.41 41.37 41.32
41.52 41.62 41.49 41.58 41.63 41.64 41.53 41.59
Twist, 0.42 0.02 0.85 0.84   EX 0.30 0.13 0.85 0.63 0.25 0.37 0.02 0.78
Crown height, mm 0.895 0.883 0.905 0.022 E EX 0.895 0.905 0.904 0.902 0.891 0.883 0.893 0.884
Pavilion depth, mm 2.427 2.413 2.441 0.029 N/A EX 2.422 2.432 2.425 2.413 2.425 2.425 2.441 2.436
Table, mm 3.280 3.272 3.287 0.015 Grading EX 3.272 3.279 3.280 3.287        
Culet, mm 0.023 0.017 0.029 0.012 E EX                
Girdle Bezel, mm 0.187 0.172 0.201 0.029 E EX 0.192 0.172 0.179 0.195 0.193 0.201 0.174 0.190
Girdle Bone, mm 0.180 0.160 0.192 0.031   EX 0.183 0.187 0.192 0.180 0.167 0.181 0.160 0.190
Girdle Valley, mm 0.086 0.073 0.106 0.033 E EX 0.080 0.076 0.083 0.091 0.083 0.099 0.089 0.077
0.084 0.086 0.092 0.078 0.073 0.078 0.094 0.106
Fish eye effect, 6.37 N/A                  
Culet through Crown Bezel, 8.34 N/A                  

Measurement as per OctoNus theory

Crown angle, 36.15 36.07 36.26 0.20     36.08 36.07 36.26 36.19        
Pavilion angle, 40.40 40.36 40.44 0.07     40.42 40.36 40.44 40.38        

 

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 0.29 -0.30 0.36 0.56 0.24 0.44 0.45
Lower girdle facets / Halves 0.51 -0.42 0.49 -0.04 0.63 -0.22 1.00 0.33
0.99 -0.87 1.08 0.55 0.48 -0.16 0.55 0.14
Crown 0.30 0.15 0.55 0.99 0.31 0.61 0.43 1.23
Upper girdle facets -0.11 0.51 0.69 0.26 0.48 0.87 -0.33 0.76
0.34 0.31 0.48 1.28 -0.66 0.91 1.44 0.41
Star facets -0.23 0.11 0.21 -0.15 -0.66 -0.24 -0.34 0.68

 
Girdle center Culet center Table center

Offset

Girdle-Culet offset by table axis 0.22 0.22, % 0.012 0.013, mm
Girdle-Table offset by table axis 0.25 0.20, % 0.014 0.011, mm
Table-Culet offset by table axis 0.34 0.24, % 0.019 0.014, mm
Girdle to table-culet line offset 0.34, % 0.019, mm

Culet shift ratio by main diameter

 

Main diameter (avg) 5.727, 100%
Width-wise culet shift ratio 2.873 mm, 50.17 % 2.848 mm, 49.73 %
Lengh-wise culet shift ratio 2.863 mm, 49.99 % 2.867 mm, 50.05 %

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -0.19 EX -1.32 1.85 EX
Crown painting, notches 0.0, Negligible 0.4 0.5
Pavilion painting, 0.40 Digging EX 1.10 1.37 EX
Pavilion painting, notches 0.1, Very small 0.3 0.4

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -0.41 -0.36 0.53 0.29 -0.07 0.12 -1.32 -0.45
0.03 0.30 -0.13 -0.85 -1.08 0.32 0.21 -0.11
Crown painting, notches 0.1 0.1 0.1 0.1 0.0 0.0 0.4 0.1
0.0 0.1 0.0 0.2 0.3 0.1 0.1 0.0
Pavilion painting, 0.51 0.71 0.21 -0.26 0.93 0.58 0.64 0.23
0.43 1.10 0.84 -0.11 0.04 0.61 0.10 -0.14
Pavilion painting, notches 0.1 0.2 0.1 0.1 0.2 0.2 0.2 0.1
0.1 0.3 0.2 0.0 0.0 0.2 0.0 0.0

 
Cut parameters description

Open 3D model of the scanned brilliant
To open 3D model you need a free GemAdviser software

Download GemAdviser