Being a new cut in the industry, the Radiant cut diamond has immense popularity for its exquisite sparkle and versatility. The diamond combines the elegance of a round cut and the purity of an emerald cut.
If you are a modern jewelry lover, Radiant cut diamonds can be your go-to option. In this guide, we will explore the characteristics of radiant cut diamonds. We will also examine their anatomy, certification, inclusion, and more.
Understanding Radiant Cut Diamond
Radiant cut diamond is a rectangular or square-shaped diamond. It is a hybrid combination of round brilliant and step-cut diamonds. It has straight sides and clipped facets. Radiant cut diamond has 70 exceptionally great facets, which is the highest number of all cuts.
The radiant cut is a modern cut with class. Just less than 50 years, the stunning cut boasts a sweet balance between modernness and class.
Radiant cut diamonds are featured with an eight-sided outline. This cut is also called or referred to as “modified brilliant” or "cut-cornered rectangular.”
Key Characteristics of Radiant Cut Diamonds
Radiant Cut diamonds hold unique properties and characteristics that exclude them from other cuts. Below are some of the key attributes of Radiant Cut Diamonds:
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Shape and Appearance |
A hybrid cut combining the elegance of an emerald cut with the brilliance of a round cut. Radiant cuts are typically rectangular or square in shape with cropped corners. |
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Faceting Style |
Known for its brilliant faceting pattern, radiant cuts maximize sparkle and fire. This cut has 70 facets, ensuring exceptional light reflection. |
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Versatility |
Complements a variety of settings, including solitaires, halos, and three-stone designs. |
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Durability |
The clipped corners enhance durability, making the diamond less prone to chipping. |
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Face-Up Size |
Radiant cuts tend to appear smaller face-up compared to round or oval diamonds of the same carat weight due to their deeper proportions. |
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Fire and Brilliance |
Offers a dazzling combination of brilliance and fire, making it a popular choice for those seeking maximum sparkle. |
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Color Retention |
The cut hides color well, making it an excellent choice for lower color grades. |
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Unique Appeal |
A contemporary alternative to classic shapes, offering a modern and sophisticated look. |
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Budget-Friendly |
Generally, it is more affordable than round diamonds, offering more carat weight for the price. |
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Customizable Ratios |
Available in both rectangular and square ratios, allowing buyers to choose a silhouette that suits their preferences. |
The combination of cuts gives the diamond the elegance of an emerald cut and the brilliance of a round brilliant cut.
Origin and History of Radiant Cut Diamonds
The master diamond cutter Henry Grossbard invented the Radiant cut in 1976. He was an immigrant to the USA from Austria during WW2.
After being introduced to the market, the Radiant cut became hugely popular in the 1980s. This is because of its light performance characteristics and shape.
As a result, it snatched the attention of all diamantaires. After a while, it becomes a subject to experiment. Over time, various faceting patterns and proportions were optimized.
Over the years, diamond cutters have achieved more improvements and further refined forms of Radiant cut. Today, we see the best combination of elegance and brilliance in this masterpiece.
Radiant cut is mostly popular for engagement rings among diamond lovers, including celebrities.
Radiant Cut Diamond vs. Other Cuts
Here, we have compared Radiant cut diamonds with some popular cuts so that you understand how they differ.
Comparison with Brilliant-Cut Diamonds
Radiant cuts and brilliant cuts share similarities, such as high brilliance and fire. However, they have differences in shape, faceting, and light performance.
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Comparison |
Radiant cut |
Brilliant cut |
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Shape |
Rectangular or square-shaped with cropped corners |
Brilliant cut diamonds are round in shape |
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Faceting |
It has 70 facets |
Brilliant cut has 57 to 58 facets |
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Brilliance |
The second most brilliant cut |
The most brilliant cut |
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Lighting performance |
Best lighting transformation while hiding inclusion better |
Better lighting reflection and hiding the inclusion. |
Radiant Cut vs. Step Cut
Unlike step cuts (e.g., emerald or Asscher cuts), radiant cuts are designed for maximum sparkle. You will see they blend the brilliance of round diamonds with the clean lines of step cuts.
This offers a versatile, hybrid look. It is suitable for those seeking a contemporary yet elegant diamond style.
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Comparison |
Radiant cut |
Step cut |
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Diamond facet patterns |
Has complex, brilliant-cut triangular facets |
Long, parallel facets create a step effect. |
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Sparkle |
Has a level of sparkle and fire |
Has a more subtle and reflective sparkle. |
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Clarity |
Radiant cut hides inclusion better |
Inclusions can be seen |
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Shap |
Square or rectangular with trimmed corners |
Square or rectangular with less trimmed corners. |
Anatomy of a Radiant Cut Diamond
Here is the quick anatomy of Radiant cut diamond for better understanding.
Facet Patterns and Light Performance
The Square Modified Brilliant facet arrangement in radiant cuts increases their light performance. You will see that the intricate pattern allows them for incredible brilliance, fire, and scintillation. This creates a lively and captivating sparkle.
Physical Properties
- Table: The large, flat surface on the top of the diamond that allows light to enter and reflects brilliance.
- Crown: The upper portion of the diamond is located above the girdle, featuring facets that help disperse light.
- Girdle: The thin edge that forms the perimeter of the diamond, providing structural integrity.
- Pavilion: The lower portion of the diamond is located below the girdle and is designed to reflect light back through the crown for optimal brilliance.
- Facets: Radiant cuts feature 70 facets, including both crown and pavilion facets, that enhance sparkle and fire.
- Clipped Corners: The characteristic cropped edges of a radiant cut add durability and distinguish its shape.
- Depth: The height of the diamond from the table to the culet, which influences the diamond’s brilliance and face-up appearance.
- Culet: The small facet at the bottom tip of the diamond, which may or may not be visible depending on the cut quality.
Table and Depth Percentage in Radiant Cut Diamonds
The table refers to the diamond’s largest flat surface. The depth is the measurement from the table to the culet.
Ideal table percentages for radiant cuts range from 61% to 69%. And the depth percentages are between 61% and 67%. These ensure optimal light performance.
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Excellent |
Very Good |
Good |
Fair |
Poor |
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Table Percentage in Diamonds |
61%-69% |
57%-60% or 70%-72% |
54%-56 or 73%-74% |
51%-53% or 75%-79% |
<51% or >79% |
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Diamond Depth Percentage |
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% |
Culet and Symmetry
- Culet: The small facet at the diamond’s base. A small or absent culet improves brilliance. So, no culet makes an excellent diamond.
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Excellent |
Very Good |
Good |
Fair |
Poor |
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Culet |
None |
Very small |
Small |
Medium |
More than medium |
- Symmetry: Symmetry ensures the diamond’s facets align perfectly. It improves its overall appearance.
Evaluating Radiant Cut Diamonds
Here is the physical evaluation of Radiant cut diamonds that will give you a better understanding of their shapes.
Length-to-Width Ratio
The length-to-width ratio determines whether a radiant cut diamond appears square or rectangular. Ratios around 1.00 create a square shape. Opposingly, ratios between 1.15 and 1.35 offer a more elongated, rectangular appearance.
Here is a quick length-to-width ratio table.
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Excellent |
Very Good |
Good |
Fair |
Poor |
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Rectangular Shape |
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 |
Under 1.08 or Over 1.50 |
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Square Shape |
1.00 |
1.03 |
1.04-1.05 |
1.06-1.08 |
Over 1.08 |
Diamond Cut Grading
Radiant cuts are graded based on their polish, symmetry, and proportions. Certification from reputable labs like the AGS ensures buyers receive accurate information on a diamond’s cut quality.
As we mentioned earlier, Radiant cut is either square or rectangular with particular length-to-width ratios.
The balance between the facets and corner cuts makes Radiant cut diamonds appealing to diamond lovers. However, if the corners are overly trimmed, this will shape-off the diamond. As a result, this can lose its appeal.
Diamond Light Performance/Color
Radiant cuts are prized for their exceptional light performance. Their facets create a play of brilliance, fire, and scintillation.
Check your Radiant cut’s diamond bow-tie effect.
Bow Tie Effect:
In radiant cut diamonds, a subtle bow tie effect may occur due to how light is distributed across the diamond’s facets. When present, the bow tie can add depth and character to the diamond.
Though excessive darkness may detract from its brilliance, proper cutting and proportioning minimize this effect. This ensures optimal light performance and beauty.
Clarity for Diamond Inclusions and Blemishes
Radiant cuts hide inclusions better than step cuts due to their brilliant facet patterns. 70 facets create brilliant sparkles so proficiently that they can hide the impurities effectively.
For Radiant cut diamonds, VS1 and VS2 are safe enough for the highest-quality diamond clarity. VS2 and higher ensure the value and quality of your Radiant cut diamond.
The radiant cut is so brilliant that you can even go for SI1 clarity. This will also give better value and quality due to its mastery of cutting.
Fluorescence
Fluorescence refers to a diamond’s reaction to UV light. It can enhance the diamond’s brilliance. However, excessive fluorescence may cause a cloudy appearance in lower-quality stones.
However, as per GIA, fluorescence doesn’t have any impact on the structural integrity of the diamond. So does the Radiant cut. Also, only 25% to 35% of diamonds show some level of fluorescence.
Carat Weight of Radiant Cut Diamond
The carat weight of a Radiant cut diamond is also important. The bigger the carat size, the higher the price is. However, Radiant cut diamonds have a unique characteristic in terms of carat weight.
The same carat weight of a Radiant cut diamond appears bigger than other traditional diamond cuts. Particularly in elongated rectangular cuts, the elongated shape creates the illusion of a larger size.
You will find 0.32-carat size to 14.22-carat weight size of Radiant cut diamonds.
Certification and Authenticity
Certification of different organizations makes diamonds authentic and valuable in the industry. For diamonds, GIA and IGI are two top certification organizations that you can thoroughly rely on.
GIA Certification
The Gemological Institute of America (GIA) is renowned for its strict grading standards and detailed reports. This covers cut, clarity, color, and carat weight.
GIA-certified diamonds often feature laser inscriptions for added security and are highly valued in international markets. GIA certification ensures quality and transparency if you're investing in a premium diamond.
IGI Certification
The International Gemological Institute (IGI) provides reliable certifications that are widely used in retail settings. IGI reports focus on clarity and uniqueness. It is often faster and more affordable than GIA.
While IGI is a trustworthy option, its grading standards are less strict than GIA's.
GIA vs. IGI: Which Should You Trust?
GIA is ideal for high-value diamonds and long-term investments due to its strict grading and global recognition. IGI is a good choice for more budget-friendly or retail purchases.
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Aspect |
GIA Certification |
IGI Certification |
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Grading Standards |
Highly stringent and consistent |
Reliable but perceived as less strict |
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International Value |
Universally recognized and trusted |
Recognized but primarily retail-focused |
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Cost of Certification |
Typically higher |
More affordable |
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Turnaround Time |
It may take longer due to strict protocols |
Faster, often retail-oriented |
GIA certification is the top choice for peace of mind, but IGI offers accessibility for everyday purchases. Always verify certifications to match the diamond’s advertised quality.
Choosing the Perfect Radiant Cut Diamond
Before choosing your desired Radiant cut diamond ring, you should keep the following aspects in mind.
Matching Preferences and Lifestyle
Radiant cut diamonds are ideal for individuals seeking a blend of brilliance and durability. Their versatility makes them suitable for everyday wear and special occasions.
If you prefer symmetry, square radiant cuts are great. If you look for something more elongated and elegant, rectangular shapes offer more of these.
Setting Styles for Radiant Cut Diamonds
Popular settings for radiant cuts include:
- Halo: This setting increases brilliance with a circle of smaller diamonds.
- Solitaire: This highlights the diamond’s shape with a simple, elegant setting.
- Three-Stone: This setting combines the radiant cut with complementary side stones for added sparkle.
Consider 4Cs
4Cs are always the primary factor for diamonds. You should focus your attention on carat weight, color performance, clarity, and cut quality. The higher the 4Cs, the higher the prices.
However, in this aspect, price could be a factor to consider as well.
Length-to-Width Ratio
Don’t exceed the recommended length-to-width ratio we mentioned earlier. To keep the aesthetics of your RAdiant cut diamond, 1:1 is the excellent choice for a square shape, and 1.20:1 to 1.30:1 is the best for a rectangular shape.
Depth and Table Percentage
To get the highest brilliance and sparkle, choose your Radiant diamond ring with 61t67% depth and 61-69% table percentage.
Final Thoughts
Radiant cut diamonds are a stunning blend of brilliance and sophistication. The sparkle, fire, and scintillation make them a favorite among jewelry enthusiasts. Their hybrid design combines the best features of brilliant and step cuts.
The combination offers unparalleled brilliance and versatility. Whether you’re looking for a square or rectangular shape, radiant cuts deliver exceptional beauty and value.
Explore Saratti’s collection of radiant cut diamonds to find the perfect piece that suits your style and needs!