Extremely popular in the 1980s, radiant diamonds have cropped corner square shape, that is a nice bridge between a cushion and princess cuts. Radiant cut features the first square cut (the second being the princess cut) that have complete brilliant-cut facet pattern both on crown and pavilion. Radiant cut diamonds have 70 facets, making it one of the most faceted diamond shapes available on the market. The radiant cut gives diamonds a vibrant and lively look and looks amazing set with both round and square shape diamonds. This cut is very rare. In fact, only 1.6% of diamonds for sale globally are radiant cut.
Radiant Diamond Cut Guide
To make sure you understand the ideal cut specifications for radiant diamonds use the table below. It will serve you as a general guideline for evaluating the cut of a radiant cut diamond.
|TABLE %||61 - 69||57 - 60 or 70 - 72||54 - 56 or 73 - 74||51 - 53 or 75 - 79||< 51 or > 79|
|DEPTH %||61 - 67||59 - 60.9 or 67.1 - 70||57 - 58.9 or 70.1 - 74||54 - 56.9 or 74.1 - 79||< 54 or > 79|
|GIRDLE||Very Thin to Slightly Thick||Very Thin to Slightly Thick||Very Thin to Thick||Very Thin to Very Thick||Extremely Thin to Extremely Thick|
|CULET||None||Very Small||Small||Medium||> Medium|
Radiant Diamond Ratio Guide
Radiant cut diamonds come in various ratios, from perfectly square (any ratio of 1.05 or less will appear square to the naked eye) to the more traditional rectangle.
Square radiants look similar to the princess cut but with cropped corners. Actually, square radiant and princess cuts look identical once set, as the prongs cover the corners.
The table below serves as a general guideline for evaluating the ratio of a radiant cut diamond.
|SQUARE||1.00 - 1.03||1.00 - 1.03||1.04 - 1.05||1.06 - 1.08||> 1.08|
|RECTANGLE||1.20 - 1.30||1.15 - 1.19 or 1.31 - 1.35||1.10 - 1.14 or 1.36 - 1.40||1.08 - 1.09 or 1.41 - 1.50||< 1.08 or > 1.50|
Radiant Diamond Colour Guide
As a general rule, smaller radiant cut diamonds hide colour better than larger ones.
The chart below will help you decide on the colour grade of a radiant cut diamond.
|< .50 ct.||D - G||H - I||J - K||L - M||> M|
|.51-1.0 ct.||D - F||G||H - I||J - K||> K|
|1.0-2.0 ct.||D - F||D - F||G - H||I - J||> J|
|> 2.0 ct.||D - F||D - F||G||H - I||> I|
Radiant Diamond Clarity Guide
Because of its brilliance, a radiant cut diamond hides blemishes fairly well, especially in comparison to emerald-cut diamonds. Besides, smaller radiant cut diamonds hide imperfections better than larger ones. Which is why if you are going to purchase a smaller stone you may opt for a lower clarity grade while keeping an eye-clean appearance.
The clarity chart below provides a general guide for evaluating clarity in radiant cut diamonds.
|< .50 ct.||FL - VS2||SI1 - SI2||I1||I2||> I2|
|.51-1.0 ct.||FL - VS1||VS2 - SI1||SI2||I1 - I2||> SI2|
|1.0-2.0 ct.||FL - VVS2||VS1 - VS2||SI1 - SI2||I1||> I1|
|> 2.0 ct.||FL - VVS2||VS1 - VS2||SI1||SI2||> SI2|
Cover image credit: Icerock Diamonds