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Round Cut Diamonds

Explore our exquisite selection of Round Cut Diamonds. Experience our pricing transparency and shop the most competitive diamond prices.


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Quick Ship Diamonds
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Quick Ship Diamonds
Shop loose diamonds that ship in 2 days or less. Delivery dates may change if you add your diamond to a setting.
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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Girdle Thickness
The girdle is the outer edge of the diamond, where the crown top meets the pavilion bottom.
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.
Price Per Carat
Crown Angle
Pavilion Angle
Width (mm)
Height (mm)
Length (mm)
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.
Girdle Thickness
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The girdle is the outer edge of the diamond, where the crown top meets the pavilion bottom.
Very Thin
Thin
Medium
Sli. Thick
Thick
Very Thick
Ext. Thick
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
Medium
Strong
Very Strong
Price Per Carat
Crown Angle
Pavilion Angle
Width (mm)
Height (mm)
Length (mm)
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
Tool Tip Icon
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
Tool Tip Icon
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
Very Small
Small
Medium
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.
Quick Ship Diamonds
Tool Tip Icon
Quick Ship Diamonds
Shop loose diamonds that ship in 2 days or less. Delivery dates may change if you add your diamond to a setting.
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.
0.23 Carat Round Diamond
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Natural
BEST VALUE
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$315.00
0.23Carat
HColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$327.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$329.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.26 Carat Round Diamond
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Natural
BEST VALUE
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$329.00
0.26Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$329.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$329.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.23 Carat Round Diamond
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Natural
BEST VALUE
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$329.00
0.23Carat
GColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
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$334.00
0.3Carat
IColor
SI1Clarity
IdealCut

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
1.35 Carat Round Diamond
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Natural
BEST VALUE
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$5,928.00
1.35Carat
HColor
VS2Clarity
IdealCut

1.35 Carat Round Diamond
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Natural
BEST VALUE
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$5,928.00
1.35Carat
HColor
VS2Clarity
IdealCut

1.35 Carat Round Diamond
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Natural
BEST VALUE
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$5,928.00
1.35Carat
HColor
VS2Clarity
IdealCut

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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0.30 Carat Round Diamond
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Natural
BEST VALUE
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$334.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$334.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.31 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.31Carat
IColor
SI1Clarity
IdealCut

0.31 Carat Round Diamond
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Natural
BEST VALUE
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$336.00
0.31Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$337.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$338.00
0.3Carat
IColor
VS2Clarity
IdealCut

Get the Best Deal - Look for Best Value diamonds while you shop. Best Value - Learn more
0.30 Carat Round Diamond
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Natural
BEST VALUE
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$338.00
0.3Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$339.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$339.00
0.3Carat
IColor
SI1Clarity
IdealCut

0.25 Carat Round Diamond
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Natural
BEST VALUE
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$339.00
0.25Carat
IColor
VS2Clarity
IdealCut

0.30 Carat Round Diamond
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Natural
BEST VALUE
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$339.00
0.3Carat
IColor
SI1Clarity
IdealCut

You’ve viewed 24 of 173,949 products
Explore our exquisite selection of Round Cut Diamonds. Experience our pricing transparency and shop the most competitive diamond prices.


Round Cut Diamonds by Ritani

Shape

Commonly referred to as brilliant-cut diamonds, round-cut diamonds are treasured for their intense sparkle, making them the most popular diamond shape. The round cut shape reflects the maximum level of brilliance, with 58 facets—or 57 if there is no culet. Choose a round-cut diamond with an ideal-cut grade for the ultimate degree of sparkle. 

Round-cut diamonds are perfect for rings, pendants, bracelets, and earrings. To make a round-cut diamond solitaire ring appear larger, a halo setting is recommended. A halo setting features a band of tiny accent diamonds that encircle and emphasize your center diamond with added sparkle. Or, let your round-cut diamond stand out with an elegant solitaire setting. 

All Ritani earth-grown diamonds are certified by the AGS or GIA—the world’s most respected independent grading labs. If you need help selecting a round-cut diamond, contact us at 1-888-9RITANI or [email protected].

Earth Grown Diamonds

Earth grown diamonds are mined from deep under the earth's surface where they have lain dormant for millions of years. When you hold an earth grown diamond, reflect on the immense journey this diamond has taken and the history it has endured.

A diamond starts out in the lowly form of graphite, such as you might find in the tip of your pencil. Over the course of hundreds of millions of years, the immense pressure and temperature produced deep inside the earth rearrange the carbon atoms into a crystal structure.

Then miners dig deep tunnels under the earth and collect the rough diamonds. The rough diamond looks nothing like the sparkly diamond you are holding. It has an irregular shape, is very dirty and looks dull. The diamond is then cleaned, cut into it's desired shape, and finally polished into the beautiful diamond you are now holding!

All Ritani earth grown diamonds are certified by either the AGS or GIA – the two most respected independent grading labs in the world.

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

Frequently Asked Questions

  • How much does a Round Cut Diamond cost?
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    A Round Cut Diamond can cost anywhere between $180 and $420,000 depending on the 4 cs. The median price is $1,300.