• Hearts & Arrows Ideal Cut
• American Ideal Cut
• International Fine Trade Cut
• American Average Cut or Average Cut
• Below Average Cut
• AGA Round Diamond Proportions chart
• AGA Princess Diamond Proportions chart
• AGA Pear, Heart, Oval, Marquise Diamond Proportions Chart
• AGA Emerald & Radiant Diamond Proportions Chart
• Marcel Tolkowsky
• AGS Proportions Charts for Brilliant Cut

Diamond Shapes | Diamond Weight | Diamond Proportions | Diamond Color | Diamond Clarity
Interesting Diamonds facts

AGS Proportions Charts for Brilliant Cut

Average Pavilion Depth, %	AGS Grade	Average Table Diameter, %	AGS Grade	Crown Angle in degrees	AGS Grade
39,4 and less	10	46.3 and smaller	10	28.3 and less	10
39.5-40.1	9	46.4-47.3	9	28.4-29.1	9
40.2-40.6	8	47.4-48.3	8	29.2-29.6	8
40.7-41.1	7	48.4-49.3	7	29.7-30.1	7
41.2-41.6	5	49.4-50.3	7	30.2-30.6	6
41.7-42.1	3	50.4-51.3	3	30.7-31.1	5
42.2-43.8	1	51.4-52.3	1	31.2-31.6	4
43.9-44.3	0	52.4-57.5	0	31.7-32.1	3
44.4-44.8	1	57.6-59.5	1	32.2-32.6	2
44.9-45.3	3	59.6-62.0	2	32.7-33.6	1
45.4-45.8	4	62.1-63.5	3	33.7-35.8	0
45.9-46.3	5	63.6-65.5	4	35.9-36.3	1
46.4-46.8	7	65.6-67.5	5	36.4-36.8	2
46.9-47.5	8	67.6-69.5	6	36.9-37.3	3
47.6-48.5	9	69.6-71.5	7	37.4-37.8	4
48.6+	10	71.6-73.5	8	37.9-38.3	5
		73.6-75.5	9	38.4-38.8	6
		75.6+	10	38.9-39.3	7
			10	39.4-39.8	8
			10	39.9 and greater	9, 10

Polish and Symmetry Characteristics	AGS Grade	Girdle Thikness	AGS Grade	Culet Size	AGS Grade
Extremely Difficult 10x	0	Extremely Thin	3	None, Very small	0
Very Difficult 10x	1	Very Thin	1	Small, Medium, Slightly Large	1
Difficult 10x	2	Thin, Medium	0	Large	3
Easy 10x	3	Slightly Thick, Thick	2	Very Large	5
Very Easy 10x	4	Very Thick	5	Extremely Large	7-10
Obvious 10x	5	Extremely Thick	7-10
Unaided Eye	6
Easy Unaided Eye	7, 8
Obvious Unaided Eye	9, 10

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