General information
Model	st8
Expert name	Makoed A.G.
Report date	09.12.2007
Real weight, ct
Calculated weight, ct	0.70, 0.7031
Appraiser title	GIA_PCTG_StarCul
Overall cut quality	V
Symmetry appraiser title	Internal
Overall symmetry quality	EX
Spread	0.01 ct, 1.65%
AGS Spread	0.01 ct, 1.32%
Measurements	5.770 (5.764-5.776) x 3.453 / 0.001 mm
Girdle to MIC	0.001 mm
Extra Facet / Nat	No
Average values, mm
Diameter	5.770
Crown height	0.851
Pavilion depth	2.428
Total height	3.453
Table	3.307
Culet	0.021
Girdle Bezel	0.174
Girdle Bone	0.167
Girdle Valley	0.076

 

Parameter	Avg	Min	Max	Dev	Cut	Sym	1	2	3	4	5	6	7	8
Diameter, mm	5.770	5.764	5.776	0.22%	E	EX	5.772	5.776	5.772	5.772
Crown angle, °	34.55	34.36	34.83	0.47	Grading	EX	34.68	34.75	34.83	34.59	34.38	34.36	34.36	34.47
Pavilion angle, °	40.16	39.97	40.32	0.35	Grading	EX	40.10	39.97	39.98	40.17	40.32	40.25	40.31	40.16
Total height, %	59.84				E
Crown height, %	14.75	14.54	14.91	0.37	E	EX	14.79	14.86	14.91	14.84	14.68	14.63	14.54	14.74
Pavilion depth, %	42.07	41.84	42.25	0.41	N/A	EX	42.05	41.94	41.84	42.04	42.22	42.15	42.25	42.07
Table, %	57.30	57.14	57.47	0.33	Grading	EX	57.24	57.37	57.47	57.14
Culet, %	0.37	0.33	0.40	0.07	E	EX
Girdle Bezel, %	3.01	2.94	3.09	0.14	E	EX	2.97	3.04	3.09	2.96	2.94	3.04	3.05	3.01
Girdle Bone, %	2.89	2.59	3.15	0.56		EX	2.85	3.15	2.92	2.66	2.99	2.92	3.01	2.59
Girdle Valley, %	1.33	1.05	1.58	0.53	E	EX	1.14	1.39	1.55	1.58	1.26	1.25	1.05	1.21
							1.26	1.37	1.50	1.27	1.53	1.49	1.24	1.14
Star: Upper ratio, %	53.61:	52.75:	54.54:	1.79			54.17:	53.80:	53.41:	54.54:	53.18:	53.60:	53.44:	52.75:
	46.39	47.25	45.46				45.83	46.20	46.59	45.46	46.82	46.40	46.56	47.25
Star angle, °	22.31	21.99	22.67	0.67		EX	22.34	22.48	22.67	22.43	21.99	22.23	22.30	22.07
Upper girdle angle, °	42.00	41.46	42.40	0.94		EX	42.12	41.94	42.16	42.31	42.05	42.01	42.40	42.08
							41.72	41.46	41.79	41.79	42.00	42.03	41.80	42.40
Lower girdle angle / Halves angle, °	41.37	41.05	41.52	0.47		EX	41.49	41.32	41.05	41.06	41.25	41.30	41.47	41.51
							41.48	41.50	41.48	41.52	41.40	41.30	41.38	41.38
Twist, °	0.49	0.17	0.89	0.72		EX	0.89	0.47	0.17	0.61	0.49	0.25	0.32	0.73
Crown height, mm	0.851	0.839	0.860	0.021	E	EX	0.853	0.858	0.860	0.856	0.847	0.844	0.839	0.851
Pavilion depth, mm	2.428	2.414	2.438	0.024	N/A	EX	2.427	2.420	2.414	2.426	2.436	2.432	2.438	2.427
Table, mm	3.307	3.297	3.316	0.019	Grading	EX	3.303	3.310	3.316	3.297
Culet, mm	0.021	0.019	0.023	0.004	E	EX
Girdle Bezel, mm	0.174	0.170	0.178	0.008	E	EX	0.172	0.175	0.178	0.171	0.170	0.176	0.176	0.174
Girdle Bone, mm	0.167	0.149	0.182	0.032		EX	0.165	0.182	0.169	0.154	0.173	0.169	0.174	0.149
Girdle Valley, mm	0.076	0.061	0.091	0.030	E	EX	0.066	0.080	0.089	0.091	0.073	0.072	0.061	0.070
							0.072	0.079	0.086	0.073	0.088	0.086	0.071	0.066
Fish eye effect, °	5.42				N/A
Culet through Crown Bezel, °	12.36				N/A
Measurement as per OctoNus theory
Crown angle, °	34.55	34.53	34.60	0.07			34.53	34.55	34.60	34.53
Pavilion angle, °	40.16	40.11	40.21	0.10			40.21	40.11	40.15	40.17

Azimuths deviation from ideal, °	1	2	3	4	5	6	7	8
Pavilion	0.00	0.66	0.64	0.87	0.77	1.05	0.58	0.11
Lower girdle facets / Halves	1.28	0.06	0.80	0.39	0.95	0.47	1.36	0.52
	0.76	0.54	1.73	0.87	0.56	0.09	0.38	-0.61
Crown	0.89	1.12	0.81	0.26	0.28	0.80	0.90	0.85
Upper girdle facets	0.76	1.36	1.40	0.41	0.47	0.33	1.02	0.15
	0.68	1.40	1.50	0.98	1.82	0.21	0.85	-0.36
Star facets	0.16	0.67	0.58	-0.16	0.26	0.32	0.83	0.24

	Girdle center		Culet center		Table center

Offset
Girdle-Culet offset by table axis	0.10 ± 0.22, %	0.006 ± 0.013, mm
Girdle-Table offset by table axis	0.06 ± 0.20, %	0.004 ± 0.011, mm
Table-Culet offset by table axis	0.07 ± 0.24, %	0.004 ± 0.014, mm
Girdle to table-culet line offset	0.07, %	0.004, mm

Culet shift ratio by main diameter
Main diameter (avg)	5.770, 100%
Width-wise culet shift ratio	2.882 mm, 49.95 %	2.890 mm, 50.08 %
Lengh-wise culet shift ratio	2.881 mm, 49.93 %	2.891 mm, 50.10 %

Paint / Dug	Avg	Type	Sym	Max	Dev	Sym
Crown painting, °	0.25		EX	1.25	1.85	EX
Crown painting, notches	0.1, Negligible			0.3	0.5
Pavilion painting, °	0.34		EX	1.28	1.58	EX
Pavilion painting, notches	0.1, Negligible			0.3	0.4

Paint / Dug	1	2	3	4	5	6	7	8
Crown painting, °	-0.13	-0.24	0.28	0.40	-0.34	-0.07	0.76	0.13
	0.41	-0.60	0.70	-0.08	0.92	0.64	0.00	1.25
Crown painting, notches	0.0	0.1	0.1	0.1	0.1	0.0	0.2	0.0
	0.1	0.2	0.2	0.0	0.2	0.2	0.0	0.3
Pavilion painting, °	1.28	0.60	0.14	0.24	0.31	0.39	0.49	0.25
	-0.01	0.50	0.68	-0.30	-0.02	0.02	0.27	0.61
Pavilion painting, notches	0.3	0.2	0.0	0.1	0.1	0.1	0.1	0.1
	0.0	0.1	0.2	0.1	0.0	0.0	0.1	0.2

 

Cut parameters description

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