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Marquise Cut SI1 Diamonds

Shop our beautiful collection of Marquise Cut SI1 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
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
Medium
Strong
Very Strong
Depth
Tool Tip Icon
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
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
Very Small
Small
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.
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.
0.31 Carat Marquise Diamond
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Natural
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$240.00
0.31Carat
LColor
SI1Clarity
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0.19 Carat Marquise Diamond
Natural
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Diamond Report
$304.00
0.19Carat
EColor
SI1Clarity
GoodCut
0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$315.00
0.3Carat
KColor
SI1Clarity
VGCut
0.18 Carat Marquise Diamond
Natural
BEST VALUE
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Diamond Report
$325.00
0.18Carat
GColor
SI1Clarity
GoodCut
0.19 Carat Marquise Diamond
Natural
BEST VALUE
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Diamond Report
$343.00
0.19Carat
EColor
SI1Clarity
GoodCut
0.19 Carat Marquise Diamond
Natural
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Diamond Report
$343.00
0.19Carat
GColor
SI1Clarity
GoodCut
0.44 Carat Marquise Diamond
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Natural
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Diamond Report
$353.00
0.44Carat
LColor
SI1Clarity
VGCut
0.23 Carat Marquise Diamond
Natural
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Diamond Report
$361.00
0.23Carat
DColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
Natural
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Diamond Report
$369.00
0.3Carat
GColor
SI1Clarity
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0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$422.00
0.3Carat
FColor
SI1Clarity
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0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$431.00
0.3Carat
FColor
SI1Clarity
VGCut
0.40 Carat Marquise Diamond
Natural
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Diamond Report
$432.00
0.4Carat
HColor
SI1Clarity
GoodCut
0.40 Carat Marquise Diamond
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Natural
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Diamond Report
$434.00
0.4Carat
JColor
SI1Clarity
VGCut
0.31 Carat Marquise Diamond
Natural
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Diamond Report
$434.00
0.31Carat
DColor
SI1Clarity
GoodCut
0.28 Carat Marquise Diamond
Natural
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Diamond Report
$438.00
0.28Carat
FColor
SI1Clarity
GoodCut
0.40 Carat Marquise Diamond
Natural
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Diamond Report
$439.00
0.4Carat
IColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
Natural
BEST VALUE
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Diamond Report
$446.00
0.3Carat
DColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$447.00
0.3Carat
DColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
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Natural
BEST VALUE
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Diamond Report
$447.00
0.3Carat
FColor
SI1Clarity
GoodCut
0.30 Carat Marquise Diamond
Natural
BEST VALUE
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Diamond Report
$447.00
0.3Carat
DColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$451.00
0.3Carat
DColor
SI1Clarity
VGCut
0.31 Carat Marquise Diamond
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Natural
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Diamond Report
$453.00
0.31Carat
EColor
SI1Clarity
VGCut
0.30 Carat Marquise Diamond
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Natural
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Diamond Report
$454.00
0.3Carat
EColor
SI1Clarity
GoodCut
0.30 Carat Marquise Diamond
Natural
BEST VALUE
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Diamond Report
$455.00
0.3Carat
DColor
SI1Clarity
VGCut
You’ve viewed 24 of 619 products

Shop our beautiful collection of Marquise Cut SI1 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.

Marquise Cut SI1 Diamonds

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.

Clarity

undefined diamonds have slight inclusions visible under 10x magnification (SI stands for slightly included). For Marquise 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.

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 hundereds 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 Marquise Cut SI1 Diamonds, reach out to us at 1-888-9RITANI or chat now.

Frequently Asked Questions

  • How much does a Marquise Cut SI1 Diamond cost?
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    A Marquise Cut SI1 Diamond can cost anywhere between $240 and $77,000 depending on the 4 cs. The median price is $1,100.