• 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

Pear, Heart, Oval, Marquise Diamond Proportions Chart

	Ideal Cut	Premium Cut	International Fine Trade Cut		US domestic Average Cut		Below Average Cut
Cut classes	Class 1A	Class 1B	Class 2A	Class 2B	Class 3A	Class 3B	Class 4A	Class 4B
Table, %	57-60	60.1-61.5 56.9-54	61.6-62 53.9-53	62.1-64.0 52.9-52	64.1-67.0 51.9-51.0	67.1-70.0 50.9-50	70.1-72.0 49.9-49	>72.0 <49.0
Crown height, %	13-14.5	12.9-12.5 14.6-15	12.4-12 15.1-15.6	11.9-11.1 15.7-16.5	11.0-9.7 16.6-17.3	9.6-8.7 17.4-18.4	8.6-7.8 18.5-19.5	< 7.8 > 19.5
Girdle Thikness, % Word description and percentages	Thin to Medium or Medium to Thick 1% to 3.0% or 1.7% to 5.5%			Thin to Thick 1% to 5.5% > more variance allowed	Very thin to Very thick 0.4% to 7.0%		Extremely thin to Extremely thick 0% to > 7.0%
Total Depth, % Determined by factors already considered above	59.0-63.0			63.1-65.4 58.9-58.0	65.5-68.5 57.9-56.0	68.6-71.0 55.9-46.0	71.1-73.0 45.9-43.0	> 73.0 < 43.0
Length/Width ratio Trade Preferences. A matter of personal taste and choice.	Pear 1.50-1.75 Marquise 1.75-2.25 Heart 0.98-1.02 Oval 1.33-1.66				1.26-1.99 1.51-2.49 1.24-0.91 1.26-1.74		> Class 3 < Class 3
Polish/Symmetry Not a primary determining factor	Excellent to Good				Good or Fair		Poor

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