General information
Model	st4
Expert name	Makoed A.G.
Report date	11.12.2007
Real weight, ct
Calculated weight, ct	0.70, 0.7016
Appraiser title	GIA_PCTG_StarCul
Overall cut quality	V
Symmetry appraiser title	Internal
Overall symmetry quality	VG
Spread	0.01 ct, 0.72%
AGS Spread	0.00 ct, 0.40%
Measurements	5.752 (5.745-5.762) x 3.472 / 0.008 mm
Girdle to MIC	0.008 mm
Extra Facet / Nat	No
Average values, mm
Diameter	5.752
Crown height	0.852
Pavilion depth	2.444
Total height	3.472
Table	3.289
Culet	0.019
Girdle Bezel	0.175
Girdle Bone	0.173
Girdle Valley	0.079

 

Parameter	Avg	Min	Max	Dev	Cut	Sym	1	2	3	4	5	6	7	8
Diameter, mm	5.752	5.745	5.762	0.29%	E	EX	5.756	5.756	5.754	5.760
Crown angle, °	34.55	34.41	34.72	0.31	Grading	EX	34.57	34.62	34.45	34.41	34.44	34.57	34.64	34.72
Pavilion angle, °	40.45	40.21	40.75	0.54	Grading	EX	40.22	40.29	40.55	40.75	40.74	40.56	40.29	40.21
Total height, %	60.35				E
Crown height, %	14.82	14.55	15.12	0.57	E	EX	14.55	14.74	14.67	14.84	14.80	15.02	15.12	14.81
Pavilion depth, %	42.49	42.32	42.68	0.36	N/A	EX	42.44	42.42	42.49	42.68	42.65	42.45	42.32	42.44
Table, %	57.17	56.93	57.42	0.49	Grading	EX	57.42	57.10	56.93	57.22
Culet, %	0.33	0.30	0.35	0.05	E	EX
Girdle Bezel, %	3.05	2.86	3.36	0.50	E	EX	3.36	3.18	3.19	2.86	2.91	2.88	2.90	3.10
Girdle Bone, %	3.01	2.64	3.35	0.71		VG	3.28	3.05	2.75	2.86	3.13	3.00	2.64	3.35
Girdle Valley, %	1.37	1.10	1.72	0.62	E	EX	1.42	1.54	1.57	1.46	1.22	1.20	1.21	1.10
							1.41	1.39	1.46	1.40	1.13	1.20	1.52	1.72
Star: Upper ratio, %	54.67:	53.08:	56.19:	3.12			55.66:	54.26:	54.15:	56.19:	55.41:	53.98:	53.08:	54.67:
	45.33	46.92	43.81				44.34	45.74	45.85	43.81	44.59	46.02	46.92	45.33
Star angle, °	22.79	22.74	22.99	0.24		EX	22.74	22.74	22.76	22.99	22.78	22.77	22.77	22.75
Upper girdle angle, °	42.37	42.03	43.09	1.06		VG	42.37	42.40	42.14	42.12	43.09	42.81	42.42	42.27
							42.47	42.36	42.05	42.21	42.03	42.32	42.38	42.43
Lower girdle angle / Halves angle, °	41.53	41.26	41.87	0.61		EX	41.33	41.36	41.38	41.51	41.71	41.81	41.85	41.87
							41.73	41.73	41.52	41.45	41.36	41.31	41.26	41.30
Twist, °	0.40	0.01	0.87	0.87		EX	0.01	0.09	0.52	0.87	0.09	0.51	0.75	0.36
Crown height, mm	0.852	0.837	0.870	0.033	E	EX	0.837	0.848	0.844	0.854	0.851	0.864	0.870	0.852
Pavilion depth, mm	2.444	2.435	2.455	0.021	N/A	EX	2.441	2.440	2.444	2.455	2.453	2.442	2.435	2.441
Table, mm	3.289	3.275	3.303	0.028	Grading	EX	3.303	3.285	3.275	3.291
Culet, mm	0.019	0.017	0.020	0.003	E	EX
Girdle Bezel, mm	0.175	0.164	0.193	0.029	E	EX	0.193	0.183	0.183	0.164	0.167	0.166	0.167	0.179
Girdle Bone, mm	0.173	0.152	0.193	0.041		VG	0.189	0.176	0.158	0.165	0.180	0.172	0.152	0.193
Girdle Valley, mm	0.079	0.063	0.099	0.035	E	EX	0.082	0.088	0.090	0.084	0.070	0.069	0.070	0.063
							0.081	0.080	0.084	0.081	0.065	0.069	0.088	0.099
Fish eye effect, °	6.68				N/A
Culet through Crown Bezel, °	11.74				N/A
Measurement as per OctoNus theory
Crown angle, °	34.55	34.50	34.59	0.09			34.50	34.59	34.54	34.56
Pavilion angle, °	40.45	40.42	40.48	0.06			40.48	40.43	40.42	40.48

Azimuths deviation from ideal, °	1	2	3	4	5	6	7	8
Pavilion	0.00	0.14	0.42	0.10	-0.44	-0.08	-0.61	-0.57
Lower girdle facets / Halves	-0.30	0.12	0.00	0.22	-0.01	-0.08	-0.12	-0.15
	-0.68	-0.14	-0.63	-0.57	-0.56	-0.37	-0.61	-0.43
Crown	-0.01	0.23	-0.09	-0.77	-0.35	0.44	0.14	-0.93
Upper girdle facets	0.01	0.41	0.09	-0.31	1.27	-1.81	0.26	-0.35
	0.44	-0.02	0.52	-0.36	0.16	-1.52	-0.88	-0.78
Star facets	-0.20	-0.36	0.05	-0.35	0.13	-0.16	0.11	-0.26

	Girdle center		Culet center		Table center

Offset
Girdle-Culet offset by table axis	0.48 ± 0.22, %	0.028 ± 0.013, mm
Girdle-Table offset by table axis	0.20 ± 0.20, %	0.012 ± 0.011, mm
Table-Culet offset by table axis	0.60 ± 0.24, %	0.035 ± 0.014, mm
Girdle to table-culet line offset	0.60, %	0.035, mm

Culet shift ratio by main diameter
Main diameter (avg)	5.752, 100%
Width-wise culet shift ratio	2.857 mm, 49.67 %	2.899 mm, 50.39 %
Lengh-wise culet shift ratio	2.886 mm, 50.17 %	2.867 mm, 49.85 %

Paint / Dug	Avg	Type	Sym	Max	Dev	Sym
Crown painting, °	0.41	Digging	EX	1.36	1.55	EX
Crown painting, notches	0.1, Very small			0.4	0.4
Pavilion painting, °	-0.09		EX	-0.55	0.98	EX
Pavilion painting, notches	0.0, Negligible			0.1	0.3

Paint / Dug	1	2	3	4	5	6	7	8
Crown painting, °	0.02	-0.18	-0.13	0.22	1.36	1.04	1.04	-0.01
	0.80	0.45	0.08	0.50	0.02	0.59	0.05	0.77
Crown painting, notches	0.0	0.0	0.0	0.1	0.4	0.3	0.3	0.0
	0.2	0.1	0.0	0.1	0.0	0.2	0.0	0.2
Pavilion painting, °	-0.30	0.02	-0.14	0.20	-0.44	0.18	-0.22	-0.29
	-0.24	0.07	-0.55	-0.03	0.04	-0.20	-0.03	0.43
Pavilion painting, notches	0.1	0.0	0.0	0.1	0.1	0.0	0.1	0.1
	0.1	0.0	0.1	0.0	0.0	0.1	0.0	0.1

 

Cut parameters description

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