Marquise Cut Diamond Size Chart: Guide to the Perfect Selection
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Marquise Cut Diamond Size Chart: Your Guide to the Perfect Selection

Marquise Cut Diamond Size Chart: Your Guide to the Perfect Selection

The marquise cut diamond boasts a unique shape that maximizes carat weight and elongates the finger, offering a distinctive and elegant look. Its history is as fascinating as its appearance; it is believed that the cut's origins date back to the 18th century when King Louis XV of France commissioned a diamond to mirror the smile of his beloved Marquise of Pompadour. Over time, this cut has evolved but retains the same alluring qualities that caught the king's eye.

As a reflection of my understanding of diamonds, I appreciate the marquise cut for its ability to appear larger than other diamonds of the same carat weight due to its elongated shape. When selecting a marquise diamond, I recommend referencing a size chart specific to this cut, as its dimensions differ significantly from that of round or princess-cut stones. This knowledge is instrumental for anyone looking to search for the perfect marquise cut diamond that balances size and quality with budget considerations.

Understanding Marquise Cut Diamonds


In my experience, marquise diamonds are prized for their elegant and sophisticated shape, which has a rich historical lineage and unique aesthetic. They offer a distinctive look due to their elongated shape and carefully calibrated proportions, which contribute to their brilliance and appeal.

Historical Significance

The marquise cut's origin dates back to the 18th century, named after the Marquise of Pompadour. It's said that King Louis XV of France commissioned a diamond to mimic the shape of his mistress's lips, which has since become synonymous with opulence and grandeur. This historical connection adds an aristocratic allure to marquise diamonds, setting them apart in heritage among other diamond cuts.

Defining Features

The marquise cut is easily recognized by its elongated shape, featuring pointed ends with curved sides that resemble the hull of a boat. This modified brilliant cut strikes a delicate balance between size and sparkle. The unique outline of a marquise shaped diamond allows for a larger perceived size, which makes it a favored choice for those looking to maximize the carat weight visually.

Marquise Cut Proportions

When it comes to ideal proportions of a marquise diamond, precision is key to achieving maximum brilliance. The ideal length-to-width ratio for a marquise cut typically ranges from 1.85 to 2.10. This ensures the stone has an elegant appearance without appearing too narrow or too squat. Unlike round brilliants, the marquise cut does not have a standardized grading system; however, the symmetry of its points, alignment of its facets, and quality of polish are critical for its beauty and symmetry.

  • Table of Ideal Marquise Diamond Proportions
    • Length-to-Width Ratio: 1.85 - 2.10
    • Table Percentage: 53% - 63%
    • Depth Percentage: 58% - 62%

When chosen with these proportions in mind, the marquise diamond can exude an impressive display of light, delivering the sophistication and fire that many seek in a diamond of this calibre.

Size and Measurement

Carat Weight Length (mm) Width (mm)
0.25 5.2 2.6
0.50 6.7 3.4
1.00 9.7 4.9
1.50 11.6 5.8
2.00 13.4 6.7

In this section, I cover all the essential aspects of sizing a Marquise Cut Diamond, including the length-to-width ratio, millimeter dimensions, and the relation between carat weight and millimeter size.

Length-to-Width Ratio

The length-to-width (L/W) ratio is crucial in assessing the shape and appeal of a Marquise Cut Diamond. The ideal L/W ratio ranges from 1.85 to 2.10. This means that if a Marquise diamond has a length of 10mm, the width should ideally be between 4.76mm and 5.71mm. Higher ratios result in a more elongated shape, while lower ratios give a wider appearance.

Millimeter Dimensions

Millimeter (mm) dimensions refer to the actual physical measurements of the diamond's length and width. When selecting a Marquise diamond, knowing the mm size is important as it determines the diamond's surface area and potential impact. For instance, a one-carat Marquise might measure approximately 10mm in length by 5mm in width.

Carat to MM Conversion

The conversion from carat size to mm is unique for each diamond shape, and the Marquise is no exception. Generally, a 0.50 carat Marquise cut diamond might measure around 8.5mm x 4.5mm, while a 1 carat could measure about 10mm x 5mm. These conversions are not exact, as carat weight also accounts for the diamond's depth and not just the surface area, but they offer a good expectation for visible size.

Choosing the Right Diamond

Inspecting diamond quality

4Cs of Diamonds


The quality of the diamond's cut affects its brilliance and sparkle.


Diamond color is graded on a scale from D (colorless) to Z (light yellow or brown).


Clarity measures the presence of internal and external flaws or blemishes.

🌟Carat Weight

Carat weight refers to the size of the diamond and is a factor in its value.

When I select a diamond, I pay close attention to its quality, shape, and the expert advice that can guide my purchasing decision. It's crucial to consider all these aspects to ensure I make a confident and informed choice, especially if the diamond is for an engagement ring.

Evaluating Diamond Quality

Quality is the cornerstone of a diamond's value and beauty. I examine carat, color, clarity, and cut—four critical characteristics known as the 4 Cs. Carat weight affects size and price, while color can range from colorless to a yellow tint, which is subtler to the eye but important to the diamond's grading. Clarity refers to the absence of inclusions and blemishes; the fewer there are, the more exquisite the diamond. I always check for a GIA or AGS certification; these are reputable labs that provide an unbiased assessment of a diamond's quality.

  • Carat: Heavier diamonds are more valuable and signify a higher carat.
  • Color: A scale from D (colorless) to Z (light color) is used to grade diamond color.
  • Clarity: Grades range from Flawless (FL) to Included (I), indicating the presence of internal or external imperfections.
  • Certified Diamonds: A GIA or AGS certified diamond ensures that the diamond has been graded accurately.

Diamond Shape Comparison

The shape of a diamond significantly affects its overall appearance. While a round brilliant cut remains the most popular due to its versatility and sparkle, fancy shapes like the marquise cut can offer a unique twist and often a larger perceived size for the same carat weight. Shapes such as pear, oval, and marquise can appear larger than round diamonds of the same weight. It's a personal preference but knowing the visual effects of each shape is important for my decision.

  • Round: Maximum brilliance and fire; highly versatile.
  • Marquise: Creates an elongated look, making the finger appear longer and slimmer.

Buying Tips

Purchasing a diamond encompasses more than just analyzing technical specifications. I also consider the purpose of the diamond—whether it's for an engagement ring or another piece of jewelry—as it sets the stage for the style and design I select. I recommend prioritizing what aspects of a diamond are most important to me, such as carat size over flawless clarity, to stay within my budget. Most importantly, I ensure to buy from reputable jewelers and request documentation for the diamond's diamond grading report to confirm its quality.

  • Prioritize: Decide which of the 4 Cs are most important and budget accordingly.
  • Documentation: Always ask for the diamond's grading report.

Marquise Diamond Settings and Styles

Different types of Marquise Diamond ring shown in the image.


When I consider the marquise diamond's unique elegance, I prioritize its setting. The correct setting not only enhances this gem's beauty but also helps protect its delicate points from chipping.

Popular Ring Settings

In terms of engagement rings, the marquise cut shines in a variety of settings that secure the stone and showcase its shape. The solitaire setting is a timeless choice, encapsulating the stone in either four or six prongs, emphasizing the diamond's elongated shape. For those seeking added stability, the V-prong setting is ideal, as it specifically targets the tips of the marquise to prevent chipping. I find the bezel setting intriguing for its modern appearance, as it completely surrounds the diamond with metal, thus offering substantial protection. In a halo setting, smaller diamonds encircle the marquise, making it appear larger and more brilliant.

  • Solitaire: Showcases the marquise cut with minimal distraction.
  • V-prong: Special prongs secure the delicate points of the marquise.
  • Bezel: Offers a sleek, contemporary look with maximum protection.
  • Halo: A layer of smaller diamonds amplifies the marquise's presence.

Styling for Maximum Effect

Whether I'm handling recently purchased rings or vintage pieces, I recommend specific metals and styles to amplify the marquise cut's appeal. Yellow gold brilliantly contrasts with the marquise diamond, bringing out its fire and brilliance. However, recent trends show a rising preference for white metals, such as platinum or white gold, which provide a sleek and continuous look. For maximum effect, pairing a marquise with side stones, like baguettes or trillions, on the band adds a spectacle of light and creates a regal profile.

  • Yellow Gold: Enhances the marquise diamond with a warm, classic backdrop.
  • White Metals: Offers a modern, seamless extension of the diamond's brilliance.
  • Side Stones: Complements the marquise cut for that added grandeur on the finger.

Impact of Cut on Appearance

A beautiful Marquise Cut Diamond and close view of its facet.


I will explore how the cut of a marquise diamond influences its visual appeal. Key facets—literally and figuratively—include the arrangement of facets, symmetry and polish, and the proportions that affect visual effects like brilliance and perceived size.

Facet Arrangement

The unique shape of a marquise cut diamond—reminiscent of a football—owes its form to the specific facet arrangement. My aim is to highlight how these facets operate in concert to amplify the stone's sparkle. With the marquise cut, the pattern affects how light behaves inside the diamond, where ideally, light enters and reflects out to maximize brilliance.

Symmetry and Polish

Attention to symmetry is crucial, as exacting symmetry ensures that each facet reflects light properly. The marquise diamond's elongated shape exacerbates any asymmetry, which can distort the reflection of light, detracting from the stone's allure. Meanwhile, polish affects how cleanly light passes through the diamond; poor polish can leave the stone looking dull.

Visual Effects of Proportions

The proportions of a marquise diamond—particularly the depth and table size, influence how large the stone appears. An ideal ratio between length and width creates a slimmer, elongated appearance, often making the diamond seem larger than its actual carat weight. A well-executed cut limits undesirable effects like the bow-tie—a dark area across the center of the diamond that occurs when light doesn't bounce back due to misaligned angles and proportions.

Diamond Care and Maintenance

A lady cleaning a diamond ring with soft cloth.


Caring for your marquise cut diamond ensures its brilliance and safeguards your investment. I'll guide you through essential maintenance steps and warranty options for peace of mind.

Protecting Your Investment

Maintaining the luster of your diamond isn't just about preserving its beauty, it's about protecting your investment. I recommend a biannual inspection by diamond experts to identify any potential flaws or necessary repairs. Here are specific steps I take for my diamonds:

  1. Clean Regularly: Soak the diamond in a solution of warm water and mild dish soap. I use a soft brush to gently scrub away accumulated dirt, focusing on the bottom of the diamond where grime collects.

  2. Professional Check-up: Besides my own care routine, an expert's inspection can pinpoint issues I might overlook, such as loose prongs or structural weaknesses in the setting.

  3. Storage: When not in use, I store my diamond jewelry separately to prevent scratches. A fabric-lined jewelry case with dividers is my go-to for keeping each piece safe.

Lifetime Warranty Options

Investing in a lifetime warranty can alleviate concerns about potential damage to your marquise cut diamond. I look for warranties that cover:

  • Annual Cleaning: Regular professional cleaning that ensures any care-related issues are identified and addressed quickly.

  • Repairs and Replacements: Assurance that any flaws or damages occurring under normal wear will be repaired or, if necessary, the diamond will be replaced.

Carefully reviewing the warranty details is crucial; as a consumer, I ensure I understand what’s included and any actions required on my part to keep the warranty valid.

Investment and Resale Considerations

💎 Round Cut: $5,000

💎 Princess Cut: $4,500

💎 Emerald Cut: $4,200

💎 Asscher Cut: $4,000

💎 Radiant Cut: $4,100

💎 Oval Cut: $4,300

💎 Marquise Cut: $4,400

💎 Pear Cut: $4,600

💎 Heart Cut: $4,800

When it comes to investing in marquise-cut diamonds, I focus on analyzing the potential for value appreciation over time and the intricacies of the resale market. It's essential to understand how these factors play a part in the diamond's lifecycle from purchase to potential sale.

Diamond Value Over Time

The value of a certified marquise-cut diamond can fluctuate over time, influenced by various factors such as market demand, rarity, and inflation. Diamonds certified by reputable organizations like the Gemological Institute of America (GIA) tend to retain value better due to the assurance of quality. When considering a diamond as an investment, I look at historical price trends and compare them to current economic conditions to gauge future value potential.

Understanding Resale Value

The resale value of a diamond is not always equal to the initial purchase price, particularly for retail consumers. Resale is often influenced by factors like the diamond's condition, rarity, and the current market demand for specific diamond shapes. For instance, while marquise-cut diamonds may have a unique appeal, they could be subject to trends and thus, the resale value might significantly differ from the original budget. When purchasing a diamond, I ensure it’s a certified diamond to aid in maintaining its resale worth.

Best seller jewelry collection


Frequently Asked Questions

When choosing a marquise diamond, it's essential to consider its size, shape, and how it complements the wearer's hand. The FAQs below address key aspects relating to the marquise diamond's size and proportions.

What is the typical size range for small to large marquise diamonds?

Small marquise diamonds start at about 5 millimeters in length, while larger ones can exceed 15 millimeters. Size preference often depends on personal style and the setting's design.

How does the carat weight of a marquise diamond relate to its actual size?

The carat weight of a marquise diamond doesn't always directly correlate with its visual size; a 1-carat diamond might appear larger due to elongated shape and slender cut.

Can you explain the ideal length-to-width ratio for a well-proportioned marquise diamond?

A well-proportioned marquise diamond typically has a length-to-width ratio between 1.75 and 2.15. This range ensures a balance between elegance and perceived size.

How does the size of a marquise diamond affect its appearance on the hand?

Larger marquise diamonds can create an illusion of longer, more slender fingers, while smaller sizes work well for a more subtle, everyday look. The diamond's shape plays a significant role in its overall appearance on the hand.

What are the visual differences between a 1-carat and a 2-carat marquise diamond?

A 2-carat marquise diamond will generally appear longer and wider than a 1-carat stone. However, the actual size difference might be less dramatic due to the marquise cut's slender silhouette.

What factors should be considered when comparing the sizes and prices of marquise diamonds?

When comparing marquise diamonds, consider cut quality, color, clarity, and carat weight. The diamond's proportion and how it interacts with light can affect perceived beauty and value more than just carat size.

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