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Round Cut Lab Grown Diamonds

Shop our beautiful collection of Round Cut 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.
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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
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.
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.
0.07 Carat Round Lab Diamond
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$104.00
Ideal | D | VVS2
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0.30 Carat Round Lab Diamond
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$139.00
Ideal | E | SI1
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0.34 Carat Round Lab Diamond
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$139.00
Ideal | F | VS2
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Best Value
0.32 Carat Round Lab Diamond
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$140.00
Ideal | D | VS2
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Best Value
0.30 Carat Round Lab Diamond
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$142.00
Ideal | D | SI1
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Best Value
0.30 Carat Round Lab Diamond
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$143.00
Ideal | F | VVS2
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Best Value
0.31 Carat Round Lab Diamond
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Fast Delivery
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$145.00
Ideal | D | SI1
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Best Value
5% off Lab Diamonds with code LAB5
0.32 Carat Round Lab Diamond
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$146.00
Ideal | D | VS2
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0.37 Carat Round Lab Diamond
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$147.00
Ideal | F | VVS2
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0.37 Carat Round Lab Diamond
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$147.00
Ideal | F | VVS2
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Best Value
0.32 Carat Round Lab Diamond
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$148.00
Ideal | E | SI1
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0.44 Carat Round Lab Diamond
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$149.00
Ideal | E | SI1
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Best Value
0.32 Carat Round Lab Diamond
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$151.00
Ideal | D | SI1
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0.35 Carat Round Lab Diamond
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Fast Delivery
Fast Delivery
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$151.00
Ideal | E | VS2
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
Best Value
Best Value
Get the Best Deal - Look for Best Value diamonds while you shop. Best Value - Learn more
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
Best Value
Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
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Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
Best Value
Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
Best Value
Best Value
0.32 Carat Round Lab Diamond
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$152.00
Ideal | D | VS1
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Diamond Report
Best Value
Best Value
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Round Cut Lab Grown Diamonds

Shape

Round-cut diamonds, commonly known as brilliant-cut diamonds, are highly valued for their stunning sparkle, making them the most sought-after diamond shape. This shape exhibits the highest level of brilliance, with 58 facets or 57 facets if there is no culet. Opt for a round-cut diamond with an ideal-cut grade to achieve the ultimate sparkle.

Round-cut diamonds are perfect for rings, pendants, earrings, and bracelets. For those seeking to create the illusion of a larger diamond in a solitaire ring, a halo setting is recommended. This type of setting features a band of small accent diamonds that encircle the center diamond and enhance its sparkle. Alternatively, you can let your round-cut diamond take center stage with an elegant solitaire setting.

All Ritani lab-grown diamonds are certified by International Gemological Institute, (IGI) the most respected independent lab diamond grading laboratory. If you need help selecting a round-cut lab-grown diamond, contact us at 1-888-9RITANI or chat now!

Frequently Asked Questions

  • How much does a Round Cut Lab Grown Diamond cost?
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    A Round Cut Lab Grown Diamond can cost anywhere between $83 and $47,000 depending on the 4 cs. The median price is $1,400.