Appendix III. Proportions and Measurements

No	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
Total Depth %
GIA	63	59.8	60.6	62.2	61.9	61.9	61.5	61.5	60.9	61.8	63.0	62.8	61.5	60.4	61.2	56.9	63.0
AGS	63.2	60.1	60.8	62.6	61.8	61.8	61.4	61.2	60.8		63.0	63.4	61.6	60.8	61.4	57.3	63.4
EGL	63.1	60.4	60.7	62.4	62.3	62.1	61.8	61.9	61.1	62	63.3	63.3	61.8	60.8	61.5	57.4	63.5
Table %
GIA	55	60	61	59	53	54	56	57	57	56/57	59	58	60	56	54	62	54
AGS	54	59	60	59	54	55	57	57	57		59	58	60	55	54	61	54
EGL	54	58	60	58	54	54	56	57	57	56	59	58	60	56	53	62	54
Girdle
GIA	Med – S.Thk F	Med F	Thn – Med F	Thn – Med F	Med F	Thn – Med F	Med F	Thn – Med F	Thn F	Med – S.Thk F	S.Thk F	Thn – Thk F	Med – S.Thk	Thn	Med	Thn – Med F	Med – Thk F
AGS	Med – Thk F	Thn – S.Thk F	Thn – S.Thk F	V.Thn – Med F	0.9% – 2.0% F	0.7% – 1.5% F	1.5% – 2.2%	0.7% – 1.5% F	0.7% – 1.2% F		S.Thk F	Thn – Thk F	Med – Thk	Thn	Thn – Med	Thn – Med F	S.Thk – Thk, F
EGL	Med – S.Thk F	Med F	V.Thn – Thn	V.Thn – Thn	Thn F	Thn F	Thn – med F	0.7% – 1.3%	Thn F	Thn – Med F	S.Thk F	X.Thn – S.Thk F	Med – S.Thk SF	Thn	Med – S.Thk	Thn – Med F	S.Thk – Thk F
Diameter Min (mm)
GIA	5.72	6.00	6.63	6.58	5.49	5.43	5.44	5.48	5.78	5.67	5.86	5.63	5.79	6.79	6.50	7.15	5.62
AGS	5.71	5.99	6.64	6.59	5.50	5.43	5.45	5.5	5.79		5.87	5.62	5.79	6.79	6.50	7.14	5.62
EGL	5.71	5.99	6.63	6.58	5.47	5.41	5.43	5.47	5.76	5.65	5.85	5.60	5.77	6.77	6.49	7.13	5.61
Diameter Max (mm)
GIA	5.81	6.05	6.68	6.63	5.52	5.46	5.48	5.51	5.81	5.69	5.92	5.70	5.85	6.82	6.60	7.19	5.65
AGS	5.81	6.05	6.7	6.63	5.54	5.47	5.49	5.52	5.82		5.92	5.69	5.87	6.80	6.59	7.18	5.65
EGL	5.78	6.03	6.68	6.62	5.51	5.45	5.46	5.51	5.8	5.67	5.91	5.67	5.88	6.81	6.59	7.16	5.66
Total Depth (mm)
GIA	3.63	3.6	4.03	4.11	3.41	3.37	3.36	3.38	3.53	3.51	3.71	3.56	3.58	4.11	4.01	4.08	3.55
AGS	3.61	3.62	4.05	4.14	3.41	3.37	3.36	3.37	3.53		3.71	3.58	3.59	4.13	4.02	4.10	3.57
EGL	3.63	3.63	4.04	4.12	3.42	3.37	3.37	3.39	3.54	3.51	3.72	3.57	3.59	4.12	4.02	4.10	3.57
Pavilion Angle
AGS	40.8	41.4		41.3	41.1	40.9	40.8	41.1	41		41.8	41.2	41.5	40.9	41.1	41.1	40.9
EGL								41.2
Pavilion Depth %
AGS	42.9	43.7	44.3	43.6	43.3	43.1	43.0	43.4	43.2		44.3	43.4	43.9	43.2	43.4	43.4	43.2
EGL	42.8	44.3	44.3	43.5	43.5	43.3	43.1	43.8	43.5	42.8	44.6	43.4	44.1	43.2	43.6	43.7	43.2
Crown Angle
AGS	35.4	32.3	33.2	34.5	34.0	34.4	34.3	34.2	34.1		35.9	37.2	34.3	34.9	33.7	29.7	34.7
EGL								34.4
Crown Height %
AGS	16.3	13		14.2	15.6	15.4	14.8	14.5	14.5		14.8	15.8	13.7	15.5	15.3	11.0	15.8
EGL	16.5	13.1	13.2	14.5	15.7	15.7	14.9	14.8	14.7	14.8	14.8	16.0	13.9	15.5	15.4	10.9	16.0
Culet
GIA	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N
AGS	P	P	P	P	P	P	P	P	P		P	P	P	P	P	P	P
EGL	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N	N

No	1
Total Depth %
GIA	63
AGS	63.2
EGL	63.1
Table %
GIA	55
AGS	54
EGL	54
Girdle
GIA	Med – S.Thk F
AGS	Med – Thk F
EGL	Med – S.Thk F
Diameter Min (mm)
GIA	5.72
AGS	5.71
EGL	5.71
Diameter Max (mm)
GIA	5.81
AGS	5.81
EGL	5.78
Total Depth (mm)
GIA	3.63
AGS	3.61
EGL	3.63
Pavilion Angle
AGS	40.8
EGL
Pavilion Depth %
AGS	42.9
EGL	42.8
Crown Angle
AGS	35.4
EGL
Crown Height %
AGS	16.3
EGL	16.5
Culet
GIA	N
AGS	P
EGL	N

No	2
Total Depth %
GIA	59.8
AGS	60.1
EGL	60.4
Table %
GIA	60
AGS	59
EGL	58
Girdle
GIA	Med F
AGS	Thn – S.Thk F
EGL	Med F
Diameter Min (mm)
GIA	6.00
AGS	5.99
EGL	5.99
Diameter Max (mm)
GIA	6.05
AGS	6.05
EGL	6.03
Total Depth (mm)
GIA	3.6
AGS	3.62
EGL	3.63
Pavilion Angle
AGS	41.4
EGL
Pavilion Depth %
AGS	43.7
EGL	44.3
Crown Angle
AGS	32.3
EGL
Crown Height %
AGS	13
EGL	13.1
Culet
GIA	N
AGS	P
EGL	N

No	3
Total Depth %
GIA	60.6
AGS	60.8
EGL	60.7
Table %
GIA	61
AGS	60
EGL	60
Girdle
GIA	Thn – Med F
AGS	Thn – S.Thk F
EGL	V.Thn – Thn
Diameter Min (mm)
GIA	6.63
AGS	6.64
EGL	6.63
Diameter Max (mm)
GIA	6.68
AGS	6.7
EGL	6.68
Total Depth (mm)
GIA	4.03
AGS	4.05
EGL	4.04
Pavilion Angle
AGS
EGL
Pavilion Depth %
AGS	44.3
EGL	44.3
Crown Angle
AGS	33.2
EGL
Crown Height %
AGS
EGL	13.2
Culet
GIA	N
AGS	P
EGL	N

No	4
Total Depth %
GIA	62.2
AGS	62.6
EGL	62.4
Table %
GIA	59
AGS	59
EGL	58
Girdle
GIA	Thn – Med F
AGS	V.Thn – Med F
EGL	V.Thn – Thn
Diameter Min (mm)
GIA	6.58
AGS	6.59
EGL	6.58
Diameter Max (mm)
GIA	6.63
AGS	6.63
EGL	6.62
Total Depth (mm)
GIA	4.11
AGS	4.14
EGL	4.12
Pavilion Angle
AGS	41.3
EGL
Pavilion Depth %
AGS	43.6
EGL	43.5
Crown Angle
AGS	34.5
EGL
Crown Height %
AGS	14.2
EGL	14.5
Culet
GIA	N
AGS	P
EGL	N

No	5
Total Depth %
GIA	61.9
AGS	61.8
EGL	62.3
Table %
GIA	53
AGS	54
EGL	54
Girdle
GIA	Med F
AGS	0.9% – 2.0% F
EGL	Thn F
Diameter Min (mm)
GIA	5.49
AGS	5.50
EGL	5.47
Diameter Max (mm)
GIA	5.52
AGS	5.54
EGL	5.51
Total Depth (mm)
GIA	3.41
AGS	3.41
EGL	3.42
Pavilion Angle
AGS	41.1
EGL
Pavilion Depth %
AGS	43.3
EGL	43.5
Crown Angle
AGS	34.0
EGL
Crown Height %
AGS	15.6
EGL	15.7
Culet
GIA	N
AGS	P
EGL	N

No	6
Total Depth %
GIA	61.9
AGS	61.8
EGL	62.1
Table %
GIA	54
AGS	55
EGL	54
Girdle
GIA	Thn – Med F
AGS	0.7% – 1.5% F
EGL	Thn F
Diameter Min (mm)
GIA	5.43
AGS	5.43
EGL	5.41
Diameter Max (mm)
GIA	5.46
AGS	5.47
EGL	5.45
Total Depth (mm)
GIA	3.37
AGS	3.37
EGL	3.37
Pavilion Angle
AGS	40.9
EGL
Pavilion Depth %
AGS	43.1
EGL	43.3
Crown Angle
AGS	34.4
EGL
Crown Height %
AGS	15.4
EGL	15.7
Culet
GIA	N
AGS	P
EGL	N

No	7
Total Depth %
GIA	61.5
AGS	61.4
EGL	61.8
Table %
GIA	56
AGS	57
EGL	56
Girdle
GIA	Med F
AGS	1.5% – 2.2%
EGL	Thn – med F
Diameter Min (mm)
GIA	5.44
AGS	5.45
EGL	5.43
Diameter Max (mm)
GIA	5.48
AGS	5.49
EGL	5.46
Total Depth (mm)
GIA	3.36
AGS	3.36
EGL	3.37
Pavilion Angle
AGS	40.8
EGL
Pavilion Depth %
AGS	43.0
EGL	43.1
Crown Angle
AGS	34.3
EGL
Crown Height %
AGS	14.8
EGL	14.9
Culet
GIA	N
AGS	P
EGL	N

No	8
Total Depth %
GIA	61.5
AGS	61.2
EGL	61.9
Table %
GIA	57
AGS	57
EGL	57
Girdle
GIA	Thn – Med F
AGS	0.7% – 1.5% F
EGL	0.7% – 1.3%
Diameter Min (mm)
GIA	5.48
AGS	5.5
EGL	5.47
Diameter Max (mm)
GIA	5.51
AGS	5.52
EGL	5.51
Total Depth (mm)
GIA	3.38
AGS	3.37
EGL	3.39
Pavilion Angle
AGS	41.1
EGL	41.2
Pavilion Depth %
AGS	43.4
EGL	43.8
Crown Angle
AGS	34.2
EGL	34.4
Crown Height %
AGS	14.5
EGL	14.8
Culet
GIA	N
AGS	P
EGL	N

No	9
Total Depth %
GIA	60.9
AGS	60.8
EGL	61.1
Table %
GIA	57
AGS	57
EGL	57
Girdle
GIA	Thn F
AGS	0.7% – 1.2% F
EGL	Thn F
Diameter Min (mm)
GIA	5.78
AGS	5.79
EGL	5.76
Diameter Max (mm)
GIA	5.81
AGS	5.82
EGL	5.8
Total Depth (mm)
GIA	3.53
AGS	3.53
EGL	3.54
Pavilion Angle
AGS	41
EGL
Pavilion Depth %
AGS	43.2
EGL	43.5
Crown Angle
AGS	34.1
EGL
Crown Height %
AGS	14.5
EGL	14.7
Culet
GIA	N
AGS	P
EGL	N

No	10
Total Depth %
GIA	61.8
AGS
EGL	62
Table %
GIA	56/57
AGS
EGL	56
Girdle
GIA	Med – S.Thk F
AGS
EGL	Thn – Med F
Diameter Min (mm)
GIA	5.67
AGS
EGL	5.65
Diameter Max (mm)
GIA	5.69
AGS
EGL	5.67
Total Depth (mm)
GIA	3.51
AGS
EGL	3.51
Pavilion Angle
AGS
EGL
Pavilion Depth %
AGS
EGL	42.8
Crown Angle
AGS
EGL
Crown Height %
AGS
EGL	14.8
Culet
GIA	N
AGS
EGL	N

No	11
Total Depth %
GIA	63.0
AGS	63.0
EGL	63.3
Table %
GIA	59
AGS	59
EGL	59
Girdle
GIA	S.Thk F
AGS	S.Thk F
EGL	S.Thk F
Diameter Min (mm)
GIA	5.86
AGS	5.87
EGL	5.85
Diameter Max (mm)
GIA	5.92
AGS	5.92
EGL	5.91
Total Depth (mm)
GIA	3.71
AGS	3.71
EGL	3.72
Pavilion Angle
AGS	41.8
EGL
Pavilion Depth %
AGS	44.3
EGL	44.6
Crown Angle
AGS	35.9
EGL
Crown Height %
AGS	14.8
EGL	14.8
Culet
GIA	N
AGS	P
EGL	N

No	12
Total Depth %
GIA	62.8
AGS	63.4
EGL	63.3
Table %
GIA	58
AGS	58
EGL	58
Girdle
GIA	Thn – Thk F
AGS	Thn – Thk F
EGL	X.Thn – S.Thk F
Diameter Min (mm)
GIA	5.63
AGS	5.62
EGL	5.60
Diameter Max (mm)
GIA	5.70
AGS	5.69
EGL	5.67
Total Depth (mm)
GIA	3.56
AGS	3.58
EGL	3.57
Pavilion Angle
AGS	41.2
EGL
Pavilion Depth %
AGS	43.4
EGL	43.4
Crown Angle
AGS	37.2
EGL
Crown Height %
AGS	15.8
EGL	16.0
Culet
GIA	N
AGS	P
EGL	N

No	13
Total Depth %
GIA	61.5
AGS	61.6
EGL	61.8
Table %
GIA	60
AGS	60
EGL	60
Girdle
GIA	Med – S.Thk
AGS	Med – Thk
EGL	Med – S.Thk SF
Diameter Min (mm)
GIA	5.79
AGS	5.79
EGL	5.77
Diameter Max (mm)
GIA	5.85
AGS	5.87
EGL	5.88
Total Depth (mm)
GIA	3.58
AGS	3.59
EGL	3.59
Pavilion Angle
AGS	41.5
EGL
Pavilion Depth %
AGS	43.9
EGL	44.1
Crown Angle
AGS	34.3
EGL
Crown Height %
AGS	13.7
EGL	13.9
Culet
GIA	N
AGS	P
EGL	N

No	14
Total Depth %
GIA	60.4
AGS	60.8
EGL	60.8
Table %
GIA	56
AGS	55
EGL	56
Girdle
GIA	Thn
AGS	Thn
EGL	Thn
Diameter Min (mm)
GIA	6.79
AGS	6.79
EGL	6.77
Diameter Max (mm)
GIA	6.82
AGS	6.80
EGL	6.81
Total Depth (mm)
GIA	4.11
AGS	4.13
EGL	4.12
Pavilion Angle
AGS	40.9
EGL
Pavilion Depth %
AGS	43.2
EGL	43.2
Crown Angle
AGS	34.9
EGL
Crown Height %
AGS	15.5
EGL	15.5
Culet
GIA	N
AGS	P
EGL	N

No	15
Total Depth %
GIA	61.2
AGS	61.4
EGL	61.5
Table %
GIA	54
AGS	54
EGL	53
Girdle
GIA	Med
AGS	Thn – Med
EGL	Med – S.Thk
Diameter Min (mm)
GIA	6.50
AGS	6.50
EGL	6.49
Diameter Max (mm)
GIA	6.60
AGS	6.59
EGL	6.59
Total Depth (mm)
GIA	4.01
AGS	4.02
EGL	4.02
Pavilion Angle
AGS	41.1
EGL
Pavilion Depth %
AGS	43.4
EGL	43.6
Crown Angle
AGS	33.7
EGL
Crown Height %
AGS	15.3
EGL	15.4
Culet
GIA	N
AGS	P
EGL	N

No	16
Total Depth %
GIA	56.9
AGS	57.3
EGL	57.4
Table %
GIA	62
AGS	61
EGL	62
Girdle
GIA	Thn – Med F
AGS	Thn – Med F
EGL	Thn – Med F
Diameter Min (mm)
GIA	7.15
AGS	7.14
EGL	7.13
Diameter Max (mm)
GIA	7.19
AGS	7.18
EGL	7.16
Total Depth (mm)
GIA	4.08
AGS	4.10
EGL	4.10
Pavilion Angle
AGS	41.1
EGL
Pavilion Depth %
AGS	43.4
EGL	43.7
Crown Angle
AGS	29.7
EGL
Crown Height %
AGS	11.0
EGL	10.9
Culet
GIA	N
AGS	P
EGL	N

No	17
Total Depth %
GIA	63.0
AGS	63.4
EGL	63.5
Table %
GIA	54
AGS	54
EGL	54
Girdle
GIA	Med – Thk F
AGS	S.Thk – Thk, F
EGL	S.Thk – Thk F
Diameter Min (mm)
GIA	5.62
AGS	5.62
EGL	5.61
Diameter Max (mm)
GIA	5.65
AGS	5.65
EGL	5.66
Total Depth (mm)
GIA	3.55
AGS	3.57
EGL	3.57
Pavilion Angle
AGS	40.9
EGL
Pavilion Depth %
AGS	43.2
EGL	43.2
Crown Angle
AGS	34.7
EGL
Crown Height %
AGS	15.8
EGL	16.0
Culet
GIA	N
AGS	P
EGL	N

Abbreviations Girdle
X.Thn –	Extremely Thin
V.Thn –	Very Thin
Thn –	Thin
Med –	Medium
S.Thk –	Slightly Thick
Thk –	Thick
F –	Faceted
Culet
N –	None
P –	Pointed