Radiant Cut Diamonds

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Square or Rectangular Cut Cornered Modified Brilliant

Radiant cuts are square or rectangular mixed cuts with angled corners. Henry Grossbard patented the Radiant cut in the late 1970s, as a brilliant alternative to the Emerald cut. Radiant cuts are often utilized to maximize color in fancy colored diamonds. The nature of this cut aids in the concentration of color, and will sometimes push a light yellow diamond in the S-Z range into the fancy yellow category. Radiants are categorized as Cut Cornered Modified Brilliant cuts by major diamond grading labs.

**Visit Radiant Cut Diamond Prices for the latest retail diamond price statistics.

Special Characteristics of Radiant Cut Diamonds

Because of the angled corners, Radiant cuts lack the setting issues of sharply cornered Princess cuts, which require extra care.

Size Matters

Like Princess cuts, Radiant cuts generally look smaller from the “face up” position than other diamond shapes of the same weight as a result of their different design.

Basic Radiant Cut Guidelines courtesy of http://datlas.com/AGA_NAJA_Cut_Class_grader/index.php

CUT CLASSES	Class 1A	Class 1B	Class 2A	Class 2B	Class 3A	Class 3B	Class 4A	Class 4B
	Ideal cut	Premium cut	International fine trade cut		US domestic average cut		below average
Table %	60-65.5%	59-68%	58-69.5%	57-72%	56-74%	53-76.%	50-78.%	>78% <50%
Crown Height %	12-15.%	11-16%	10-16.5%	9-17.2%	8-18.0%	7-19.5%	6-20.5%	<6% >20.5%
Girdle thickness Word descriptions and percentages.	V. Thin to Sl. Thick (0.4%-4.5%) or Thin to Thick (1%-5.5%)			V.Thin to Thick(0.4%-5.5%)	Very Thin to Very Thick (0.4% to 7.0%)		Extremely thin to Extremely thick (0.0% to >7.0%)
Total Depth %	60-65%			58-69%	57-74%	56-78%	53-80%	>80% <53%
Polish/Symmetry Not a primary determining factor.	Excellent to Good			Good or Fair			Poor to Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.5-1.75			1.49-1.26 1.76-1.99			> Class 3 < Class 3

CUT CLASSES	Class 1A
	Ideal cut
Table %	60-65.5%
Crown Height %	12-15.%
Girdle thickness Word descriptions and percentages.	V. Thin to Sl. Thick (0.4%-4.5%) or Thin to Thick (1%-5.5%)
Total Depth %	60-65%
Polish/Symmetry Not a primary determining factor.	Excellent to Good
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.5-1.75
CUT CLASSES	Class 1B
	Premium cut
Table %	59-68%
Crown Height %	11-16%
Girdle thickness Word descriptions and percentages.	V. Thin to Sl. Thick (0.4%-4.5%) or Thin to Thick (1%-5.5%)
Total Depth %	60-65%
Polish/Symmetry Not a primary determining factor.	Excellent to Good
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.5-1.75
CUT CLASSES	Class 2A
	International fine trade cut
Table %	58-69.5%
Crown Height %	10-16.5%
Girdle thickness Word descriptions and percentages.	V. Thin to Sl. Thick (0.4%-4.5%) or Thin to Thick (1%-5.5%)
Total Depth %	60-65%
Polish/Symmetry Not a primary determining factor.	Excellent to Good
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.5-1.75
CUT CLASSES	Class 2B
	International fine trade cut
Table %	57-72%
Crown Height %	9-17.2%
Girdle thickness Word descriptions and percentages.	V.Thin to Thick(0.4%-5.5%)
Total Depth %	58-69%
Polish/Symmetry Not a primary determining factor.	Good or Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.49-1.26 1.76-1.99
CUT CLASSES	Class 3A
	US domestic average cut
Table %	56-74%
Crown Height %	8-18.0%
Girdle thickness Word descriptions and percentages.	Very Thin to Very Thick (0.4% to 7.0%)
Total Depth %	57-74%
Polish/Symmetry Not a primary determining factor.	Good or Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.49-1.26 1.76-1.99
CUT CLASSES	Class 3B
	US domestic average cut
Table %	53-76.%
Crown Height %	7-19.5%
Girdle thickness Word descriptions and percentages.	Very Thin to Very Thick (0.4% to 7.0%)
Total Depth %	56-78%
Polish/Symmetry Not a primary determining factor.	Good or Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	1.49-1.26 1.76-1.99
CUT CLASSES	Class 4A
	below average
Table %	50-78.%
Crown Height %	6-20.5%
Girdle thickness Word descriptions and percentages.	Extremely thin to Extremely thick (0.0% to >7.0%)
Total Depth %	53-80%
Polish/Symmetry Not a primary determining factor.	Poor to Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	> Class 3 < Class 3
CUT CLASSES	Class 4B
	below average
Table %	>78% <50%
Crown Height %	<6% >20.5%
Girdle thickness Word descriptions and percentages.	Extremely thin to Extremely thick (0.0% to >7.0%)
Total Depth %	>80% <53%
Polish/Symmetry Not a primary determining factor.	Poor to Fair
Square range Length : Width ratios Preferences only	0.95-1.05
Rectangular range Length : Width ratios Preferences only	> Class 3 < Class 3