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3 Carat Marquise Cut Lab Grown Diamonds

Shop our beautiful collection of 3 Carat Marquise 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.
Shape
Shape influences the personality and price of a diamond.
Type
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.
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Delivery Date
In a rush to get your diamond? Choose your ideal delivery date.
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.
Delivery Date
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In a rush to get your diamond? Choose your ideal delivery date.
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
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
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
Table
Tool Tip Icon
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
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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.
2.82 Carat Marquise Lab Diamond
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$1,167.00
2.82Carat
GColor
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2.83 Carat Marquise Lab Diamond
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Diamond Report
$1,213.00
2.83Carat
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2.94 Carat Marquise Lab Diamond
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Diamond Report
$1,232.00
2.94Carat
GColor
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2.88 Carat Marquise Lab Diamond
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Diamond Report
$1,245.00
2.88Carat
HColor
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2.84 Carat Marquise Lab Diamond
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$1,271.00
2.84Carat
GColor
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2.90 Carat Marquise Lab Diamond
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$1,298.00
2.9Carat
GColor
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2.86 Carat Marquise Lab Diamond
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Diamond Report
$1,325.00
2.86Carat
FColor
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2.86 Carat Marquise Lab Diamond
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Diamond Report
$1,338.00
2.86Carat
IColor
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2.94 Carat Marquise Lab Diamond
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Diamond Report
$1,339.00
2.94Carat
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2.80 Carat Marquise Lab Diamond
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Diamond Report
$1,345.00
2.8Carat
GColor
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2.90 Carat Marquise Lab Diamond
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Diamond Report
$1,373.00
2.9Carat
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2.81 Carat Marquise Lab Diamond
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$1,379.00
2.81Carat
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2.81 Carat Marquise Lab Diamond
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Diamond Report
$1,381.00
2.81Carat
GColor
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2.88 Carat Marquise Lab Diamond
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Diamond Report
$1,384.00
2.88Carat
GColor
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2.82 Carat Marquise Lab Diamond
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$1,386.00
2.82Carat
GColor
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2.96 Carat Marquise Lab Diamond
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$1,386.00
2.96Carat
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2.93 Carat Marquise Lab Diamond
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$1,388.00
2.93Carat
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2.90 Carat Marquise Lab Diamond
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$1,393.00
2.9Carat
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2.80 Carat Marquise Lab Diamond
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$1,399.00
2.8Carat
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2.85 Carat Marquise Lab Diamond
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$1,401.00
2.85Carat
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2.85 Carat Marquise Lab Diamond
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$1,401.00
2.85Carat
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2.85 Carat Marquise Lab Diamond
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$1,401.00
2.85Carat
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2.86 Carat Marquise Lab Diamond
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$1,404.00
2.86Carat
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2.82 Carat Marquise Lab Diamond
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$1,413.00
2.82Carat
HColor
VS1Clarity
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Shop our beautiful collection of 3 Carat Marquise 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.

3 Carat Marquise Cut Lab Grown Diamonds

Carat Weight

3 carat diamonds are bigger than the average engagement ring diamond and are sure to make a statement and impress your significant other. The large size of your diamond will be very noticeable and make it stand out among the others

Shape

The marquise cut, somewhat similar to oval and pear shaped diamonds, has pointed ends and elegant, curved sides. It is the diamond shape with the largest surface area of all popular cuts, which means that you can find a larger-looking diamond for the same value.

The marquise cut diamond is a great choice for an engagement ring if you are looking for a diamond that will elongate your finger. King Louis XIV of France, who wanted a new diamond shape for the woman he loved – Marquise de Pompadour - commissioned the marquise cut. It is said that he wanted the diamond to be reminiscent of her smile. Because of this, the marquise shape has very romantic connotations.

If you are looking to make your marquise cut diamond appear larger, try a halo setting. Or let this unique cut stand out in a solitaire setting.

Because the marquise cut diamond has pointed ends, it is prone to chipping. Be sure to choose a setting that will protect the pointed ends.

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 3 Carat Marquise Cut Lab Grown Diamonds, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much does a 3 Carat Marquise Cut Lab Grown Diamond cost?
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    A 3 Carat Marquise Cut Lab Grown Diamond can cost anywhere between $6,900 and $18,000 depending on the 4 cs. The median price is $10,300.

  • How much does a 3 carat diamond weigh?
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    A 3 carat diamond weighs 0.6 grams or 600 milligrams.

  • How big is a 3 Carat Marquise Cut Diamond?
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    3 Carat Marquise Cut Diamonds do not all have the same dimensions, since carat is a measure of weight, not size.

    Here you can see the range of dimensions for a 3 Carat Marquise Cut Diamond

    LowHighMedian
    Length (mm)13.316.614.4
    Width (mm)7.17.97.6
    Depth (mm)4.25.14.7
    Length to width ratio (mm)1.82.21.9