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Marquise Cut Lab Grown Diamonds

Encounter the timeless elegance of Ritani's Marquise-Cut Lab-Grown Diamonds, where classic beauty converges with eco-conscious values. Each diamond boasts unparalleled transparency and carries the best value badge, perfect for marquise masterpieces that signify sustainable commitment.
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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.
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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.
0.46 Carat Marquise Lab Diamond
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$106.00
Very Good | J | SI1
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0.36 Carat Marquise Lab Diamond
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$110.00
Very Good | E | SI1
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0.34 Carat Marquise Lab Diamond
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$112.00
Very Good | D | SI1
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Best Value
0.37 Carat Marquise Lab Diamond
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$113.00
Very Good | E | SI1
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Best Value
0.36 Carat Marquise Lab Diamond
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$117.00
Very Good | F | VS2
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Best Value
0.36 Carat Marquise Lab Diamond
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$118.00
Very Good | D | SI1
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0.39 Carat Marquise Lab Diamond
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$119.00
Very Good | E | SI1
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5% off Lab Diamonds with code LAB5
0.33 Carat Marquise Lab Diamond
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$120.00
Very Good | F | VS1
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0.34 Carat Marquise Lab Diamond
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$124.00
Very Good | G | VVS2
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0.38 Carat Marquise Lab Diamond
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$125.00
Very Good | D | SI1
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0.47 Carat Marquise Lab Diamond
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$126.00
Very Good | G | SI2
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0.37 Carat Marquise Lab Diamond
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$127.00
Very Good | E | VS2
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0.37 Carat Marquise Lab Diamond
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$127.00
Very Good | E | VS2
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0.37 Carat Marquise Lab Diamond
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$127.00
Very Good | E | VS2
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0.31 Carat Marquise Lab Diamond
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$127.00
Very Good | E | VVS2
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0.32 Carat Marquise Lab Diamond
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$129.00
Very Good | F | VVS1
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0.34 Carat Marquise Lab Diamond
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$130.00
Very Good | E | VS1
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0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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Best Value
Get the Best Deal - Look for Best Value diamonds while you shop. Best Value - Learn more
0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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Best Value
0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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Best Value
0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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Best Value
0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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Best Value
0.38 Carat Marquise Lab Diamond
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$131.00
Very Good | E | VS2
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0.35 Carat Marquise Lab Diamond
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$134.00
Very Good | E | VS1
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Marquise Cut Lab Grown Diamonds by Ritani

Shape

Marquise-cut diamonds are renowned for their pointed ends and elegant curves, giving them a charming almond shape that seamlessly combines the most striking attributes of oval and pear-shaped diamonds, making this diamond cut an excellent choice for engagement rings. With a sizable surface area, marquise-cut diamonds appear larger than their actual carat weight, and their elongated shape offers a lengthening and slimming effect on the finger.

However, it is crucial to note that marquise-cut diamonds are more susceptible to chipping due to their pointed tips. To prevent damage, a prong setting will ensure your diamond remains unharmed. Additionally, a halo setting provides protection and offers the added benefit of making your diamond appear more prominent.

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 marquise-cut diamond, contact us at 1-888-9RITANI or chat now!

Frequently Asked Questions

  • How much does a Marquise Cut Lab Grown Diamond cost?
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    A Marquise Cut Lab Grown Diamond can cost anywhere between $240 and $18,000 depending on the 4 cs. The median price is $1,500.

  • What is a marquise cut lab-grown diamond?
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    ​A marquise cut lab-grown diamond features an elongated shape with pointed ends, resembling the hull of a boat. This cut is known for its ability to maximize carat weight, making the diamond appear larger than other shapes of the same weight. Lab-grown marquise diamonds are created in controlled environments, replicating the natural conditions under which diamonds develop, offering both beauty and sustainability.

  • How do I select a high-quality marquise cut lab-grown diamond?
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    When selecting a marquise cut lab-grown diamond, consider the 4 Cs: Cut, Color, Clarity, and Carat. The symmetry of the cut is crucial; both ends should align perfectly, and the sides should be symmetrical. The length-to-width ratio is also important for aesthetic appeal, with a classic marquise ratio being between 1.85 and 2.10.

  • What makes the marquise cut special compared to other diamond shapes?
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    The marquise cut is renowned for its ability to elongate the finger of the wearer, offering an elegant and sophisticated appearance. Its unique shape also maximizes the perceived size of the diamond, providing a larger surface area compared to other cuts of the same carat weight. This shape has a rich history and is often associated with royalty and luxury.


  • Are there specific settings recommended for marquise cut lab-grown diamonds?
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    Marquise cut diamonds are versatile and can be set in a variety of ring settings. However, due to their pointed ends, it's advisable to choose a setting that protects these vulnerable areas from chipping or damage. Settings with V-shaped prongs at the ends are ideal. Bezel settings or halo settings can also provide additional protection and enhance the diamond's appearance.


  • How should I care for my marquise cut lab-grown diamond?
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    Caring for a marquise cut lab-grown diamond involves regular cleaning with a soft brush and mild soap solution to maintain its brilliance. It's also recommended to have it inspected by a professional jeweler periodically to ensure the security of the setting. Avoid exposing the diamond to harsh chemicals or physical impacts that could damage it.

  • Can marquise cut lab-grown diamonds be used in custom jewelry designs?
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    Absolutely! Marquise cut lab-grown diamonds are an excellent choice for custom jewelry designs due to their distinctive shape and impressive appearance. Whether you're considering an engagement ring, a pendant, or earrings, a marquise cut diamond can add a touch of elegance and uniqueness to your custom piece.