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Radiant Cut Lab Grown Diamonds

Discover Ritani's Radiant-Cut Lab-Grown Diamonds, showcasing modern elegance with a commitment to eco-consciousness. Each diamond, celebrated for its transparency and awarded the best value badge, is perfect for crafting radiant, sustainable engagement rings that shine with integrity and value.


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Best Value
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Best Value
Shop loose diamonds in our inventory that we have identified as being Best Value. Best price and balance of the 4C's on the market.
Ritani Reserve Ritani Reserve
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Ritani Reserve
Ritani Reserve Diamonds are an exclusive selection of diamonds that have the best cut which offers maximum sparkle. They reflect the most light, maximum brilliance, fire, and scintillation.
Price
Many factors impact diamond price. With Ritani's Diamond Price Match Guarantee you can be confident you'll get the best price for a diamond. Tip: Tradition tells you to budget 2-3 months' salary for your ring. We say, just do you.
Carat
Carat is the measure of a diamond's weight and size. We offer an array of high-quality diamonds ranging from 0.18 to 25.00 carats- with 1.00 carat being the most popular.
Color
A diamond’s color grade actually measures how little color it reflects. To strike the best balance between cost and beauty, go for diamonds in the Near Colorless range: G, H, and I.
Clarity
Clarity indicates how many flaws are visible to the naked eye. Too many flaws can detract from a diamond's beauty.
Cut
Cut is the quality of a diamond’s proportions and symmetry. The better a diamond’s proportions and symmetry, the more sparkle it will produce. Cut is the most important of the 4 Cs.
Delivery Date
In a rush to get your diamond? Choose your ideal delivery date.
Polish
A well-polished diamond will have excellent light return.
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Fluorescence
Some diamonds glow blue or green when exposed to UV light. Since fluorescence is rarely visible, it has minimal impact on the appearance of your diamond. To save money, go for medium fluorescence.
Depth
Depth percentage correlates with a diamond's sparkle factor. It is measured by dividing the diamond height by its diameter. For maximum sparkle, the depth percentage of a round diamond should be between 54% and 66%.
Length/Width Ratio
The proportional relationship between your diamond’s length and width. A perfect round diamond would measure equally 1-to-1, so its LxW ratio would measure as 1.
Symmetry
Symmetry tells you how well a diamond’s facets align to create sparkle. Diamonds with perfect symmetry create the most sparkle and earn a grade of Excellent or Ideal.
Table
Table percentage tells you how big a diamond’s topmost facet (aka table) is in comparison to its diameter (aka girdle). When that ratio is in the right range, a diamond will sparkle more.
Culet
The culet is the point at the bottom of the diamond. If the point has a facet on it, it can stop light from reflecting and detract from the diamond's sparkle. Choose a diamond with no culet for optimum sparkle.
Certificate
All of Ritani’s natural diamonds are certified by either the GIA or AGSL, the industry’s two most respected grading labs.
Fluorescence
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Some diamonds glow blue or green when exposed to UV light. Since fluorescence is rarely visible, it has minimal impact on the appearance of your diamond. To save money, go for medium fluorescence.
None
Faint
Depth
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Depth percentage correlates with a diamond's sparkle factor. It is measured by dividing the diamond height by its diameter. For maximum sparkle, the depth percentage of a round diamond should be between 54% and 66%.
Length/Width Ratio
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The proportional relationship between your diamond’s length and width. A perfect round diamond would measure equally 1-to-1, so its LxW ratio would measure as 1.
Symmetry
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Symmetry tells you how well a diamond’s facets align to create sparkle. Diamonds with perfect symmetry create the most sparkle and earn a grade of Excellent or Ideal.
Excellent
Very Good
Good
Table
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Table percentage tells you how big a diamond’s topmost facet (aka table) is in comparison to its diameter (aka girdle). When that ratio is in the right range, a diamond will sparkle more.
Culet
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The culet is the point at the bottom of the diamond. If the point has a facet on it, it can stop light from reflecting and detract from the diamond's sparkle. Choose a diamond with no culet for optimum sparkle.
None
Large
Certificate
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All of Ritani’s natural diamonds are certified by either the GIA or AGSL, the industry’s two most respected grading labs.
Lab Diamond Growth Process
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Lab diamonds are made using two processes, HPHT and CVD. Both mimic the natural process of earth diamonds. LEARN ABOUT LAB DIAMONDS

Best Value
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Best Value
Shop loose diamonds in our inventory that we have identified as being Best Value. Best price and balance of the 4C's on the market.
Ritani Reserve Ritani Reserve
Tool Tip Icon
Ritani Reserve
Ritani Reserve Diamonds are an exclusive selection of diamonds that have the best cut which offers maximum sparkle. They reflect the most light, maximum brilliance, fire, and scintillation.
0.82 Carat Radiant Lab Diamond
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Lab
BEST VALUE
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$272.00
0.82Carat
GColor
SI1Clarity
VGCut

1.00 Carat Radiant Lab Diamond
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Lab
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$282.00
1Carat
GColor
SI1Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$291.00
1.03Carat
GColor
SI1Clarity
VGCut

Take 10% off Lab Diamonds with code LAB10.
0.88 Carat Radiant Lab Diamond
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$292.00
0.88Carat
GColor
SI1Clarity
VGCut

1.04 Carat Radiant Lab Diamond
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$302.00
1.04Carat
HColor
VS2Clarity
VGCut

0.61 Carat Radiant Lab Diamond
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$304.00
0.61Carat
GColor
VS2Clarity
VGCut

0.62 Carat Radiant Lab Diamond
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$309.00
0.62Carat
GColor
VS2Clarity
VGCut

GEMOLOGIST PICKS
These diamonds were hand picked by our in house gemologists who focus on balancing the 4 C's and best value pricing. Our gemologists are always here to help you find the diamond of your dreams. Chat Now
3.17 Carat Radiant Lab Diamond
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$1,963.00
3.17Carat
GColor
VS2Clarity
VGCut

2.76 Carat Radiant Lab Diamond
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$1,967.00
2.76Carat
HColor
VS2Clarity
VGCut

6.00 Carat Radiant Lab Diamond
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$1,979.00
6Carat
IColor
VS2Clarity
VGCut

Chat with a gemologist
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You can connect with a commission free gemologist instantly and receive a live diamond inspection on any diamond. You can also connect and shop together and compare up-to three diamonds at a time instantly. Try it out. Start your diamond concierge consultation today.
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0.90 Carat Radiant Lab Diamond
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$312.00
0.9Carat
IColor
SI1Clarity
VGCut

1.00 Carat Radiant Lab Diamond
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$326.00
1Carat
GColor
SI1Clarity
VGCut

1.07 Carat Radiant Lab Diamond
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$329.00
1.07Carat
GColor
SI1Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$330.00
1.03Carat
HColor
VS2Clarity
VGCut

1.01 Carat Radiant Lab Diamond
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$332.00
1.01Carat
HColor
VS2Clarity
VGCut

1.04 Carat Radiant Lab Diamond
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$335.00
1.04Carat
GColor
SI1Clarity
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1.00 Carat Radiant Lab Diamond
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$336.00
1Carat
GColor
SI1Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$336.00
1.03Carat
GColor
SI1Clarity
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1.02 Carat Radiant Lab Diamond
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$338.00
1.02Carat
HColor
VS2Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$340.00
1.03Carat
HColor
VS2Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$340.00
1.03Carat
HColor
VS2Clarity
VGCut

Get the Best Deal - Look for Best Value diamonds while you shop. Best Value - Learn more
1.04 Carat Radiant Lab Diamond
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$341.00
1.04Carat
HColor
VS2Clarity
VGCut

1.01 Carat Radiant Lab Diamond
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$342.00
1.01Carat
HColor
VS2Clarity
VGCut

1.01 Carat Radiant Lab Diamond
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Lab
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$342.00
1.01Carat
HColor
VS2Clarity
VGCut

1.03 Carat Radiant Lab Diamond
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$342.00
1.03Carat
HColor
VS2Clarity
VGCut

1.00 Carat Radiant Lab Diamond
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$343.00
1Carat
GColor
SI1Clarity
VGCut

0.82 Carat Radiant Lab Diamond
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$345.00
0.82Carat
GColor
VS2Clarity
VGCut

You’ve viewed 24 of 28,864 products
Discover Ritani's Radiant-Cut Lab-Grown Diamonds, showcasing modern elegance with a commitment to eco-consciousness. Each diamond, celebrated for its transparency and awarded the best value badge, is perfect for crafting radiant, sustainable engagement rings that shine with integrity and value.


Radiant Cut Lab Grown Diamonds

Shape

The radiant cut is a stunning hybrid of other diamond shapes - it resembles the rectangular silhouette and cropped corners of an emerald cut diamond, but with more sparkle.

Radiant cut diamonds have a modified brilliant cut, making their sparkle similar to princess cut diamonds. Radiant cut diamonds currently make up 3.3% of Ritani's diamond sales.

It's a sophisticated choice for those who want a more extraordinary diamond shape, but still with that classic sparkle. The elongated silhouette of radiant cut diamonds will make your diamond appear larger and will make your finger appear longer and more slender.

Stars who have worn radiant cut engagement rings include Jennifer Lopez and Drew Barrymore. Radiant cut diamonds are also a beautiful choice for custom jewelry, such as pendants and earrings.

Radiant cut diamonds are typically rectangular in shape, but they can also be square. For a square radiant cut diamond, choose a stone with a length to width ratio of 1.05 or less. For a rectangular radiant cut diamond, choose a stone with a length to width ratio of 1.20-1.35. Choose a length to width ratio that is appealing to you - there is no correct one.

If you want to add additional sparkle, choose a halo setting. This can also make your diamond appear larger. Or let your radiant cut diamond stand out on its own with a solitaire setting.

Lab Grown Diamonds

Lab grown diamonds are real diamonds that are created in the lab instead of deep inside the earth's crust. They are physically, chemically, and visually identical to earth grown diamonds and are indistinguishable even by a trained gemologist.

The only difference between lab grown diamonds and earth grown diamonds is how they were created. Earth grown diamonds are created under high pressure and temperature deep under the earth's surface, while lab grown diamonds are created under high pressure and temperature(HPHT) in a lab

Lab grown diamonds are typically between 30 and 50 percent cheaper than earth grown diamonds! Therefore they have become a very popular choice for engagement ring, since you can get a bigger size diamond for your budget.

All Ritani lab grown diamonds are certified. Most of our lab grown diamonds are certified by IGI, the most respected independent lab diamond grading labaratory.

If you need help selecting your Radiant Cut Lab Grown Diamonds, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much does a Radiant Cut Lab Grown Diamond cost?
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    A Radiant Cut Lab Grown Diamond can cost anywhere between $210 and $26,000 depending on the 4 cs. The median price is $2,300.

  • How are Ritani's lab-grown diamonds created?
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    ​Ritani's lab-grown diamonds are created using one of two methods: High Pressure High Temperature (HPHT) or Chemical Vapor Deposition (CVD). Both processes mimic the natural conditions under which diamonds form over millions of years, producing high-quality diamonds in a fraction of the time.


  • What makes the radiant cut special?
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    ​The radiant cut is known for its versatility, combining the brilliance and depth of round and emerald cuts, respectively. Its unique cut allows for maximum light reflection, resulting in a fiery, dazzling appearance. It's an excellent choice for those who appreciate both classic and contemporary styles.


  • Are radiant cut lab-grown diamonds from Ritani eco-friendly?
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    Yes, Ritani's lab-grown diamonds are an eco-friendly alternative to mined diamonds. The lab-growing process significantly reduces environmental impact, as it requires fewer resources and causes less ecological disruption compared to traditional diamond mining.

  • How do I care for my radiant cut lab-grown diamond?
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    Your radiant cut lab-grown diamond can be cared for just like any other diamond. Regular cleaning with a soft brush and mild soap will keep it sparkling. It's also recommended to have it inspected by a professional jeweler annually to ensure the setting remains secure.


  • Can I customize a radiant cut lab-grown diamond engagement ring at Ritani?
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    ​Absolutely! Ritani offers a wide range of customization options for engagement rings. You can choose your preferred metal, and setting style, and pair it with a radiant cut lab-grown diamond of your choice to create a ring that perfectly reflects your personal style.

  • How do I know the quality of my radiant cut lab-grown diamond?
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    All of Ritani's lab-grown diamonds, including radiant cuts, come with a grading report from reputable gemological laboratories such as the GIA (Gemological Institute of America) or IGI (International Gemological Institute). These reports detail the diamond's 4Cs (Cut, Color, Clarity, Carat) and other characteristics.


  • How do I know the quality of my radiant cut lab-grown diamond?
    arrow

    All of Ritani's lab-grown diamonds, including radiant cuts, come with a grading report from reputable gemological laboratories such as the GIA (Gemological Institute of America) or IGI (International Gemological Institute). These reports detail the diamond's 4Cs (Cut, Color, Clarity, Carat) and other characteristics.


  • Are there any differences in appearance between lab-grown and mined radiant cut diamonds?
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    To the naked eye, there are no discernible differences between a lab-grown and a mined diamond of similar quality. Both share the same physical, chemical, and optical properties.