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Radiant Cut SI1 Lab Grown Diamonds

Shop our beautiful collection of Radiant Cut SI1 Lab Grown Diamonds. Take advantage of our diamond transparency to see the wholesale cost of your diamond! Look for the best value badge to find the best priced diamonds in the market.

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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.
Shape
Shape influences the personality and price of a diamond.
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.
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Polish
A well-polished diamond will have excellent light return.
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.
Polish
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A well-polished diamond will have excellent light return.
Excellent
Very Good
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
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
Tool Tip Icon
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.
0.32 Carat Radiant Lab Diamond
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Lab
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$139.00
0.32Carat
DColor
SI1Clarity
GoodCut
0.45 Carat Radiant Lab Diamond
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Diamond Report
$177.00
0.45Carat
EColor
SI1Clarity
GoodCut
0.49 Carat Radiant Lab Diamond
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Diamond Report
$191.00
0.49Carat
DColor
SI1Clarity
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0.52 Carat Radiant Lab Diamond
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Diamond Report
$248.00
0.52Carat
EColor
SI1Clarity
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0.43 Carat Radiant Lab Diamond
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Diamond Report
$260.00
0.43Carat
FColor
SI1Clarity
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0.64 Carat Radiant Lab Diamond
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Diamond Report
$292.00
0.64Carat
FColor
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0.71 Carat Radiant Lab Diamond
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Diamond Report
$299.00
0.71Carat
HColor
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0.70 Carat Radiant Lab Diamond
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$310.00
0.7Carat
GColor
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0.67 Carat Radiant Lab Diamond
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Diamond Report
$320.00
0.67Carat
EColor
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1.00 Carat Radiant Lab Diamond
Lab
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$325.00
1Carat
EColor
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0.90 Carat Radiant Lab Diamond
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$326.00
0.9Carat
KColor
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0.70 Carat Radiant Lab Diamond
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$332.00
0.7Carat
FColor
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0.68 Carat Radiant Lab Diamond
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Diamond Report
$334.00
0.68Carat
FColor
SI1Clarity
GoodCut
0.90 Carat Radiant Lab Diamond
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$334.00
0.9Carat
IColor
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0.72 Carat Radiant Lab Diamond
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$342.00
0.72Carat
FColor
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1.00 Carat Radiant Lab Diamond
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$345.00
1Carat
DColor
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1.03 Carat Radiant Lab Diamond
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$347.00
1.03Carat
GColor
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1.07 Carat Radiant Lab Diamond
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$353.00
1.07Carat
GColor
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0.85 Carat Radiant Lab Diamond
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$354.00
0.85Carat
GColor
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0.70 Carat Radiant Lab Diamond
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$355.00
0.7Carat
EColor
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1.00 Carat Radiant Lab Diamond
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$359.00
1Carat
GColor
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0.71 Carat Radiant Lab Diamond
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$360.00
0.71Carat
EColor
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0.71 Carat Radiant Lab Diamond
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$361.00
0.71Carat
DColor
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0.91 Carat Radiant Lab Diamond
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$364.00
0.91Carat
HColor
SI1Clarity
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Shop our beautiful collection of Radiant Cut SI1 Lab Grown Diamonds. Take advantage of our diamond transparency to see the wholesale cost of your diamond! Look for the best value badge to find the best priced diamonds in the market.

Radiant Cut SI1 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.

Clarity

undefined diamonds have slight inclusions visible under 10x magnification (SI stands for slightly included). For Radiant Cut diamonds, you might notice some imperfections even to the naked eye. Make sure to look at your diamond's imagery to determine if it's eye clean or chat with a specialist to discuss your diamond.

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 SI1 Lab Grown Diamonds, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much does a Radiant Cut SI1 Lab Grown Diamond cost?
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    A Radiant Cut SI1 Lab Grown Diamond can cost anywhere between $210 and $13,000 depending on the 4 cs. The median price is $1,500.