Standard report for brilliant

General information

Model Simple
Expert name Makoed A.G.
Report date 30.06.2008
Real weight, ct
Calculated weight, ct 0.37, 0.3756
Spread 0.03ct, 8.38 %
AGS Spread N/A ct, N/A %
Measurements 4.777 (4.764-4.794) x 2.717 / 0.018 (mm)
MIC 4.746 mm
Girdle to MIC 0.018 mm
Extra Facet / Nat Yes (2)
 
Appraiser title GIA_PCTG_StarCul
Overall cut quality G
Symmetry appraiser title Internal
Overall symmetry quality FR
 
Width 4.764 mm
Length 4.794 mm
Diameter Minimum 4.764 mm
Diameter Maximum 4.794 mm
Ratio (L/W) 1.006
Total height 2.717 mm, 56.88 %

 

 

Open 3D model by a free GemAdviser Software

Average values, mm

Diameter Crown height Pavilion depth Total height Table Culet Girdle Bezel Girdle Bone Girdle Valley
4.777 0.543 2.037 2.717 3.060 0.025 0.136 0.158 0.073

Parameter

Avg

Min

Max

Dev

Cut

Sym

1

2

3

4

5

6

7

8

Diameter, mm 4.777 4.764 4.794 0.62 % E VG 4.783 4.772 4.775 4.775        
Crown angle, 32.24 31.05 32.55 1.50 Grading VG 32.41 32.54 32.14 31.05 32.44 32.24 32.52 32.55
Pavilion angle, 40.62 39.63 41.47 1.84 Grading GD 40.33 40.29 39.63 40.12 40.71 41.36 41.47 41.04
Crown height, % 11.37 10.64 12.34 1.71 V GD 12.34 12.14 11.54 10.84 10.64 10.64 11.16 11.64
Pavilion depth, % 42.64 41.67 43.72 2.05 N/A GD 41.67 42.24 41.95 42.85 43.48 43.72 43.06 42.18
Table, % 64.05 63.84 64.15 0.31 Grading EX 64.07 64.15 64.14 63.84        
Culet, % 0.53 0.35 0.63 0.28 E EX                
Girdle Bezel, % 2.84 2.39 3.40 1.01 E GD 2.87 2.39 3.40 3.19 2.72 2.47 2.60 3.06
Girdle Bone, % 3.30 2.94 3.80 0.86   VG 2.99 3.54 3.44 3.07 3.80 2.94 3.59 3.05
Girdle Valley, % 1.53 1.16 1.98 0.82 E EX 1.43 1.16 1.38 1.98 1.96 1.76 1.68 1.35
1.63 1.34 1.27 1.17 1.44 1.70 1.73 1.54
Star:
Upper ratio, %
58.39: 54.01: 63.15: 9.14     54.65: 57.84: 60.63: 58.79: 63.15: 60.26: 57.78: 54.01:
41.61 45.99 36.85 45.35 42.16 39.37 41.21 36.85 39.74 42.22 45.99
Star angle, 18.79 17.63 19.85 2.21   VG 19.32 19.37 19.22 18.60 17.63 18.30 18.04 19.85
Upper girdle facet angle, 39.91 38.83 41.11 2.28   VG 39.58 39.28 39.61 40.30 40.18 39.70 39.31 40.03
40.83 38.83 41.11 40.21 40.92 39.53 39.39 39.82
Lower girdle facet angle, 41.53 40.54 42.44 1.91   VG 41.08 41.11 41.06 40.54 40.61 40.95 41.30 41.52
41.79 42.22 42.39 42.44 42.24 42.04 41.80 41.35
Depth Girdle Facet, % 84.95 83.10 86.69 3.60 E VG 85.39 84.47 83.85 83.13 83.69 83.10 84.16 84.00
84.30 84.79 85.66 86.63 86.69 86.19 86.64 86.55
Length Girdle Facet, % 83.64 81.71 85.34 3.63 E VG 84.20 83.27 82.67 81.94 82.31 81.71 82.81 82.65
83.09 83.59 84.35 85.34 85.25 84.74 85.21 85.13
Twist, 1.38 0.03 3.61 3.58   FR 0.04 0.73 0.54 2.00 3.61 0.88 0.03 3.19
Crown height, mm 0.543 0.508 0.590 0.082 V GD 0.590 0.580 0.551 0.518 0.508 0.508 0.533 0.556
Pavilion depth, mm 2.037 1.990 2.088 0.098 N/A GD 1.990 2.018 2.004 2.047 2.077 2.088 2.057 2.015
Table, mm 3.060 3.050 3.064 0.015 Grading EX 3.061 3.064 3.064 3.050        
Culet, mm 0.025 0.017 0.030 0.013 E EX                
Girdle Bezel, mm 0.136 0.114 0.162 0.048 E GD 0.137 0.114 0.162 0.153 0.130 0.118 0.124 0.146
Girdle Bone, mm 0.158 0.140 0.181 0.041   VG 0.143 0.169 0.164 0.147 0.181 0.140 0.171 0.146
Girdle Valley, mm 0.073 0.055 0.095 0.039 E EX 0.068 0.055 0.066 0.095 0.094 0.084 0.080 0.065
0.078 0.064 0.060 0.056 0.069 0.081 0.083 0.074
Fish eye effect, 3.36 N/A                  
Kozibe, 25.30 N/A                  

Measurement as per OctoNus theory

Crown angle, 32.24 31.80 32.42 0.62     32.42 32.39 32.33 31.80        
Pavilion angle, 40.62 40.52 40.82 0.31     40.52 40.82 40.55 40.58        

Azimuths deviation from ideal,

1

2

3

4

5

6

7

8

Pavilion 0.00 0.09 0.15 1.58 1.30 0.36 0.11 0.03
Lower girdle facets / Halves -0.16 2.15 -1.28 0.91 1.13 1.88 1.93 1.72
1.40 1.65 1.33 0.71 0.27 0.38 -0.13 -0.17
Crown 0.04 0.81 -0.38 -0.42 -2.31 1.24 0.08 3.22
Upper girdle facets -1.33 2.29 -1.24 0.26 -1.41 0.73 -1.26 0.63
-3.73 5.48 0.44 3.01 -0.25 5.07 1.50 0.48
Star facets -0.96 -1.59 -0.22 -1.92 0.17 1.45 0.91 1.61

Facets' slope angles

 

Facets' azimuth angles

 

Girdle facets' angles & azimuths

 

  Girdle center Culet center Table center MIC center

Offset by table axis

Girdle-Culet offset by table axis 1.52 0.26, % 0.073 0.012, mm
Girdle-Table offset by table axis 1.24 0.23, % 0.059 0.011, mm
Table-Culet offset by table axis 1.83 0.27, % 0.087 0.013, mm
Girdle to table-culet line offset 1.83, % 0.087, mm
 

Culet shift ratio by main diameter

Main diameter (avg) 4.777 mm, 100%
Width-wise culet shift ratio 2.427 mm, 50.81 % 2.356 mm, 49.32 %
Lengh-wise culet shift ratio 2.341 mm, 49.00 % 2.434 mm, 50.94 %

Girdle asymmetry

  Recommendation for girdle
asymmetry removing
 
 
 

Paint / Dug

Avg

Type

Sym

Max

Dev

Sym

Crown painting, -1.58 Painting EX -4.24 3.91 EX
Crown painting, notches 0.4, Small 1.1 1.0
Pavilion painting, -0.30 EX -2.07 3.04 EX
Pavilion painting, notches 0.1, Negligible 0.6 0.8

Paint / Dug

1

2

3

4

5

6

7

8

Crown painting, -1.37 -1.48 -2.05 -0.65 -1.03 -1.14 -0.84 -2.94
-1.42 -4.24 -0.80 -2.93 -0.33 -1.85 -1.72 -0.43
Crown painting, notches 0.4 0.4 0.5 0.2 0.3 0.3 0.2 0.8
0.4 1.1 0.2 0.8 0.1 0.5 0.5 0.1
Pavilion painting, -0.16 -2.07 -1.37 -0.75 0.98 -0.30 0.35 -0.41
0.10 -1.29 0.97 -0.60 0.16 -0.35 -0.16 0.17
Pavilion painting, notches 0.0 0.6 0.4 0.2 0.3 0.1 0.1 0.1
0.0 0.3 0.3 0.2 0.0 0.1 0.0 0.0

Cut parameters description