Everything You Need to Know About Diamond Cut

A diamond’s cut is the biggest factor behind its sparkle. You can have perfect color and clarity on paper, but if the cut is poor, the stone will look dull and lifeless. When the cut is done well, light bounces beautifully through the diamond, creating that bright, fiery, “wow” effect people fall in love with.

If you’re choosing an engagement ring or upgrading your diamond, understanding cut will help you get the most beauty for your budget.

What is diamond cut?

“Diamond cut” doesn’t mean the shape (like oval, round, or pear) – it’s all about how the diamond has been crafted.

Every mined or lab-grown diamond starts as a rough, uneven crystal. Expert cutters then:

• Plan the best way to shape it
  
• Cut precise facets (tiny flat surfaces)
  
• Polish those facets to a mirror-like finish
  

Diamond cut grade is the score given to this craftsmanship. It tells you how well the stone handles light. Most grading systems (like GIA and IGI) describe cut using terms like:

• Excellent / Ideal
  
• Very Good
  
• Good
  
• Fair
  
• Poor
  

The better the cut, the more the diamond will look bright, lively, and larger for its carat weight. Poorly cut stones can be “bottom-heavy” or “shallow”, so they face up smaller and leak light instead of reflecting it back to your eyes.

Cut vs. Shape – what’s the difference?

These two terms get mixed up a lot, but they’re not the same:

• Shape
  
  This is the outline or silhouette of the diamond when you look at it from above.
  
  Examples: Round, Oval, Cushion, Emerald, Pear, Radiant, Princess, Marquise, Heart, etc.
  
• Cut
  
  This describes the proportions, symmetry, and polish of the diamond. Cut is what controls:
  
  
  How light enters the stone
  How it bounces around internally
  How it returns to your eyes as sparkle, fire, and brilliance

Every shape has “ideal” ranges for cut proportions. The closer a diamond is to those ideal ranges, the higher its cut grade and the better it looks in real life.

What affects a diamond’s cut grade?

Diamond laboratories look at several technical factors when deciding a cut grade. The key ones are:

1. Proportions

Proportions are the relationships between different parts of the diamond: table, depth, crown, pavilion, and more. When these are balanced correctly, light enters and exits in a beautiful way.

Two important proportion measurements to know:

• Table Percentage
  The “table” is the large flat facet on top of the diamond.
  Table % = (table width ÷ diamond width) × 100
  
  If the table is too large or too small, the diamond can look either flat and glassy or dark and “windowed”.
  
  In the ideal range, light returns evenly, giving a crisp, bright look.
  
• Depth Percentage
  Depth % = (diamond height ÷ diamond width) × 100
  
  Too deep → the diamond can look smaller and darker.
  
  Too shallow → light leaks out of the bottom, so the diamond looks dull or “washed out”.
  
  Balanced depth gives a bright, lively stone that looks true to its carat weight.
  

For round brilliant diamonds, labs use strict proportion ranges to determine cut grade. For fancy shapes (oval, cushion, pear, etc.), proportions still matter a lot, but cut may not always be graded the same way on the certificate.

2. Symmetry

Symmetry is about how well the facets line up and mirror each other.

• High symmetry = facets are evenly aligned, well-placed, and harmonious
  
• Poor symmetry = uneven facet sizes, misaligned points, or off-center culets and tables
  

Good symmetry helps light move smoothly through the stone, boosting brilliance and fire. Poor symmetry can cause dark patches, uneven sparkle, or a slightly “off” look when you view the stone.

3. Polish

Polish is the smoothness and finish of the diamond’s surface.

During the final stage of cutting, the stone is polished to remove tiny surface marks and microscopic scratches. When polish is done well, the diamond looks:

• Clear
• Crisp
• Mirror-like

If the polish is only fair or poor, the stone can appear:

• Hazy or “milky”
  
• Less crisp under light
  
• Slightly dull even if the proportions are good
  

For engagement rings, it’s smart to choose diamonds with at least Very Good or Excellent polish so you don’t lose any sparkle.

Diamond cut grades explained

Most labs use a similar five-step scale for round brilliant diamonds. Here’s what those grades usually mean:

Cut GradeWhat it looks like in real lifeExcellent / IdealMaximum brilliance, fire, and scintillation. Faces up bright and lively from every angle.Very GoodStill extremely bright with great sparkle. Minor differences vs. Excellent, often invisible to the naked eye.GoodNice sparkle, but not as lively as higher grades. A good balance for certain budgets.FairNoticeably less brightness and life. Can look somewhat dull or flat.PoorPoor proportions and almost no sparkle. Usually appears dark or glassy.

At Aurumya (and for any serious fine-jewellery purchase), it’s wise to avoid “Fair” and “Poor” cut for engagement rings. We recommend focusing on:

• Excellent / Ideal cut if you want maximum sparkle and don’t mind paying a premium
  
• Very Good (and some Good) cut diamonds if you want exceptional or strong sparkle with better value

How to choose a diamond cut (by shape)

Round Brilliant Diamonds

For round diamonds, cut is absolutely critical.

• Lab reports (like GIA or IGI) will usually have a cut grade.
  
• If your budget allows, look for:
  Cut: Excellent / Ideal or Very Good
  Polish & Symmetry: Very Good or Excellent
  

Because round brilliants follow strict standards, the cut grade on the certificate is a very reliable guide.

Fancy Shapes (Oval, Cushion, Radiant, Pear, etc.)

For non-round shapes (also called fancy shapes), grading can be a bit more nuanced:

• Some labs don’t always provide a formal cut grade for every fancy shape.
• In these cases, look closely at:
  Proportions (table % and depth %)
  Symmetry and Polish
  How the diamond looks in videos and photos – watch for dark areas, “bow-ties”, or dead zones.
  

When you're browsing, pay attention to how the stone performs in real light. Does it:

• Sparkle when it moves?
• Show a good balance of white light (brilliance) and colourful flashes (fire)?
• Avoid big, distracting dark patches?
  

That real-world performance matters more than any single number.

Balancing cut quality with your budget

Cut has a huge impact on price, but it’s also the one “C” that directly controls how beautiful the diamond looks.

A simple, practical approach:

• If sparkle is your #1 priority:
  Go for Excellent / Ideal cut with Very Good–Excellent polish and symmetry.
• If you want beauty + value:
  Choose Very Good cut. In many cases, to the naked eye, a Very Good cut can look almost identical to an Excellent cut, especially once the diamond is set in a ring.
• Be cautious with lower grades (“Good” and below):
  
  Some Good cut diamonds can still look nice, but anything Fair or Poor will usually look flat and underwhelming, even if the color and clarity are high.
  

When in doubt, prioritize cut over tiny differences in color or clarity. A well-cut diamond with slightly lower clarity or color will nearly always look better than a perfectly clean diamond with poor cut.

Final thoughts: why diamond cut matters so much

Diamond cut is the foundation of your stone’s beauty. It determines:

• How much light the diamond returns
  
• How much it sparkles when you move your hand
  
• Whether it looks big, bright, and lively – or small and dull
  

When you’re choosing a center stone for an engagement ring or any important piece, treat cut as a non-negotiable. Aim for the best cut grade your budget comfortably allows, and you’ll enjoy a diamond that looks stunning from the day you receive it and for decades to come.

Diamond Cut Guide: How to Choose a Truly Sparkling Stone

When people talk about the 4 Cs of a diamond (cut, color, clarity and carat), cut is the one that makes the biggest difference to how your diamond looks in real life.

A diamond with amazing color and clarity can still look flat and dull if the cut is poor. On the other hand, a well-cut diamond can look bright, lively, and even larger than its carat weight suggests.

In this guide, we’ll walk you through what diamond cut really means, how cut is graded, and what to look for when you’re choosing an engagement ring.

Why diamond cut matters so much

Cut is basically a measure of how well a diamond has been shaped and finished. It tells you how efficiently the stone handles light:

• 
  A high-quality cut = strong sparkle, fire, and brilliance
  
• 
  A low-quality cut = dull, lifeless appearance, even if other grades are high
  

It’s also important to know that cut grades on certificates are most consistent for round brilliant diamonds. For many fancy shapes (like oval, emerald, pear, or Asscher), cut isn’t always graded in the same way, so you need to pay closer attention to proportion, symmetry and how the stone looks in real lighting.

What is “diamond cut”, exactly?

Every diamond starts as a rough crystal—uneven, opaque, and not very beautiful yet. Expert cutters then:

1. 
   Plan how to get the best shape and brightness from the rough
   
2. 
   Saw and shape the stone into a specific style (round, oval, cushion, radiant, etc.)
   
3. 
   Add facets — tiny flat surfaces that act like mirrors for light
   
4. 
   Polish every facet so the diamond becomes bright and reflective
   

Cut describes how well this entire process has been done: the angles, proportions, alignment of facets, and the quality of the polish.

Cut vs shape: not the same thing

These two are often mixed up, so it’s helpful to separate them:

• 
  Shape = the outline you see from above
  
  
  Example: Round, Oval, Emerald, Cushion, Pear, Radiant, Marquise, Heart
  
  
  
• 
  Cut = the quality of the craftsmanship
  
  
  How well the facets are placed
  
  
  The angles and proportions
  
  
  How much light the stone returns to your eye
  
  
  

Two diamonds can both be oval shape. One may be cut beautifully and explode with sparkle; the other may look long, flat, and lifeless. Same shape, completely different cut quality.

Diamond cut grades (from best to worst)

Most laboratories use a short scale to describe cut quality, especially for round brilliant diamonds. While the exact wording can vary, you’ll often see:

• 
  Excellent / Ideal
  
  
  Superior light performance
  
  
  Outstanding brilliance, fire, and sparkle
  
  
  Faces up very bright and often looks larger for its carat weight
  
  
  
• 
  Very Good
  
  
  Still extremely bright and lively
  
  
  The difference from Excellent is often subtle to the naked eye
  
  
  A great balance between beauty and value
  
  
  
• 
  Good
  
  
  Nice sparkle but not as intense as higher grades
  
  
  Can be a budget-friendly option if other proportions and symmetry are decent
  
  
  
• 
  Fair
  
  
  Noticeably less brilliance and fire
  
  
  Dark patches or a “flat” look are more common
  
  
  
• 
  Poor
  
  
  Poor proportions and weak light performance
  
  
  Often looks glassy, dull, or lifeless
  
  
  

For engagement rings, we generally recommend staying with Good, Very Good, or Excellent cut, and avoiding Fair and Poor as they simply don’t do the diamond justice.

What influences a diamond’s cut grade?

A diamond’s cut grade is based on several technical factors. The most important are proportions, symmetry, and polish.

1. Proportions

Proportions describe how different parts of the diamond relate to each other — the table, crown, pavilion, depth, and more. These relationships control how light enters and exits the stone.

Two key proportion measurements you’ll often hear about:

Table percentage

• 
  The table is the large, flat facet on top of the diamond.
  
• 
  Table % = (table width ÷ diamond width) × 100
  

If the table is too large or too small for the shape, the diamond can:

• 
  Look glassy or washed out
  
• 
  Lose contrast and fire
  
• 
  Appear less balanced to the eye
  

When the table is within a good range for that shape, the diamond tends to look bright and crisp.

Depth percentage

• 
  Depth % = (diamond height ÷ diamond width) × 100
  

If the diamond is:

• 
  Too deep → it can look smaller than its carat weight and appear darker
  
• 
  Too shallow → light leaks out the bottom, so the diamond can look lifeless or “see-through”
  

A well-balanced depth gives you a diamond that looks lively and properly sized, with beautiful light return.

2. Symmetry

Symmetry is about how precisely the facets line up with each other.

A diamond with good symmetry will have:

• 
  Even, matching facets on all sides
  
• 
  A centered table and culet
  
• 
  Clean, balanced geometry
  

This clean structure allows light to bounce around inside the stone in an orderly way and exit as strong sparkle.

Poor symmetry can cause:

• 
  Uneven sparkle
  
• 
  Dark patches
  
• 
  A slightly “off” appearance when you look closely
  

For engagement rings, aim for Very Good or Excellent symmetry whenever possible.

3. Polish

After cutting and shaping, each facet is polished to remove tiny surface marks.

Polish describes how smooth and reflective the diamond’s surface is.

• 
  Excellent / Very Good polish → the stone looks sharp, bright, and clear
  
• 
  Fair / Poor polish → the diamond may appear hazy or slightly milky, and surface scratches can interrupt light
  

Because polish doesn’t usually affect price as dramatically as other factors, it’s smart to choose at least Very Good polish to avoid losing sparkle.

Choosing a diamond cut by shape

Round brilliant diamonds

For round diamonds, the cut grade on the certificate is extremely important and very reliable, because round brilliant cuts are standardized.

For round center stones, consider:

• 
  Cut: Excellent / Ideal or Very Good
  
• 
  Polish: Very Good or Excellent
  
• 
  Symmetry: Very Good or Excellent
  

If your budget allows, start with Excellent cut and then adjust clarity or color slightly if needed to stay within your price range.

Fancy shapes (oval, emerald, cushion, radiant, pear, etc.)

For fancy shapes, the certificate may not always show a formal cut grade, or grading may vary from lab to lab. In these cases:

• 
  Look closely at table % and depth %
  
• 
  Check symmetry and polish grades
  
• 
  Study photos and videos in good lighting
  
• 
  Watch for:
  
  
  Strong, even sparkle
  
  
  No large dead or dark areas
  
  
  For ovals and some other shapes, a balanced “bow-tie” (or as minimal as possible)
  
  
  

If you’re browsing online, always view the diamond from different angles if possible. A well-cut fancy shape should still look lively and bright as it moves.

Balancing cut quality with your budget

It’s true: the higher the cut quality, the more you’ll typically pay. But cut is also the one area where you get the most visible return.

A simple strategy:

• 
  Top-tier sparkle:
  
  
  Choose Excellent cut (or the highest equivalent grade offered), with Very Good–Excellent polish and symmetry.
  
  
  
• 
  Best value for money:
  
  
  Choose Very Good cut. These stones often look almost identical to Excellent in normal viewing conditions but can offer significant savings.
  
  
  
• 
  Only consider “Good” with care:
  
  
  Some Good cuts can be fine in certain settings, but always compare them side-by-side with higher cut grades if you can.
  
  
  
• 
  Avoid “Fair” and “Poor” for engagement rings:
  
  
  Even if they look cheaper on paper, they rarely perform well in real life.
  
  
  

If you need to compromise, it’s usually better to lower color or clarity slightly before sacrificing too much on cut.

Final thoughts: let cut lead your decision

When you’re shopping for an engagement ring or any important diamond piece, let cut be your starting point. It’s the key to:

• 
  How much your diamond sparkles
  
• 
  How big it appears for its carat weight
  
• 
  How impressive it looks every time it catches the light
  

Choosing a diamond with a strong cut — especially for your center stone — means you’ll enjoy a ring that looks brilliant, luxurious, and full of life for years to come.

Oval Cut Diamonds: Complete Guide to This Elegant, Elongated Shape

Oval cut diamonds have become one of the most-loved choices for engagement rings in recent years. They combine the intense sparkle of a round brilliant with a slimmer, elongated outline that flatters almost every hand.

Because of their stretched shape and brilliant-style faceting, oval diamond engagement rings often look larger than other cuts of the same carat weight. Whether you’re exploring natural or lab-grown diamonds, the oval cut is a versatile option that balances fire, size, and value beautifully.

In this guide, you’ll learn:

• What makes oval cut diamonds unique
• A brief history of the oval shape
• How to choose the right oval using the 4Cs
• Which settings work best with ovals
• How oval compares with round, cushion, and emerald cuts
• The key pros and cons to consider

Snapshot: Why Choose an Oval Cut Diamond?

If you’re short on time, here’s why so many people are drawn to oval cut diamonds:

• Larger face-up look: The elongated outline spreads the weight across the top, so ovals often appear bigger than other shapes of the same carat.
• Brilliant sparkle: Like round brilliant diamonds, most ovals use a similar facet pattern (typically 56–58 facets), giving them intense fire and scintillation.
• Elegant, slimming effect: The length of the stone draws the eye along the finger, creating a graceful, refined look.
• Modern yet timeless: Ovals feel current and fashion-forward while still looking classic enough to love decades from now.
• Great value: Because round diamonds are the most in-demand and tightly priced, ovals can offer a similar level of sparkle with more visible size for the same budget.

As searches for “oval engagement rings” continue to rise, this shape has firmly earned its spot as a modern classic.

A Short History of the Oval Cut

Elongated diamonds have existed for centuries, but the modern oval cut as we know it today was refined in the mid-20th century. Diamond cutters set out to create a shape that:

• Preserved the fire and brilliance of the round brilliant
• Offered a more elongated, graceful outline
• Minimized wasted rough while maximizing face-up size

By adjusting the angles, proportions, and facet layout, cutters developed the contemporary oval brilliant: a stone that combines intense light performance with a softer, stretched silhouette.

Over time, oval cut diamonds gained momentum:

• They began appearing more often in high-end jewellery collections.
• Celebrities and public figures chose oval center stones for their engagement rings, bringing extra attention to the shape.
• Brands and designers created dedicated oval-friendly settings to highlight their unique outline.

Today, oval cuts are among the most requested shapes for engagement rings and fine jewellery, especially for buyers who want something elegant and bright, but not as predictable as a round.

How to Choose an Oval Diamond: The 4Cs

Like any diamond, choosing the right oval means looking carefully at the 4Cs: Cut, Color, Clarity, and Carat weight. With ovals, each of these plays a noticeable role in how the diamond looks on the hand.

1. Cut Quality & Length-to-Width Ratio

Cut quality is the foundation of a beautiful oval. Because labs don’t always give a formal “cut grade” for fancy shapes, you’ll want to pay attention to:

• Overall proportions
• Symmetry
• Polish
• Length-to-width ratio

A classic oval is usually somewhere around 1.30–1.50 in length-to-width ratio:

• 1.30–1.35 → softer, fuller oval; looks a bit rounder
• 1.36–1.45 → balanced, traditional oval shape
• 1.46–1.50+ → longer, slimmer, more elongated appearance

There’s no “right” ratio – it’s about personal preference and how you want the diamond to sit on the finger. Just be sure to:

• Avoid proportions that make the stone look overly stubby or extremely narrow
• View the diamond face-up and from the side to ensure it sparkles evenly
• Check for any strong dark band across the middle (the “bow-tie” effect)

A well-cut oval will have strong brilliance across the entire surface, with any bow-tie appearing soft and subtle rather than harsh.

2. Color: Keeping the Oval Looking Bright

Because oval cuts show more surface area, color can be slightly easier to notice, especially near the tips and edges.

General guidance:

• For a white, bright look, many buyers prefer H color or higher.
• If you want an icy, cool appearance, consider F–G color or above.
• In yellow gold or rose gold settings, you may be able to go slightly lower in color because the warm metal gently disguises tint.

Always look at the stone from different angles and under different lighting conditions, since color can look different in daylight vs. indoor lighting.

3. Clarity: Staying Eye-Clean

The faceting of an oval tends to scatter light, which often helps to mask small inclusions. However, inclusions near the center or ends of the stone can still be visible if the clarity is too low.

A practical target for many buyers is:

• VS2 clarity or better for an eye-clean stone in most sizes
• Some SI1 diamonds can also appear eye-clean, depending on where inclusions are located

The key is to judge with your eyes, not just the certificate:

• Check if any marks are visible without magnification
• Pay extra attention to the middle of the stone and near the tips
• Ask to see magnified images or video if you’re shopping online

An oval that appears clean to the naked eye will give you full, uninterrupted sparkle.

4. Carat Weight & “Face-Up” Size

Carat weight measures the diamond’s mass, but what most people react to is how large the diamond looks from above.

Here’s where ovals really shine:

• The elongated shape spreads carat weight across a wider surface area.
• Compared to some deeper cuts (like cushions), ovals often look visibly larger at the same carat.

You’ll notice two general styles:

• Shorter, wider ovals → bold, substantial presence on the finger
• Longer, slimmer ovals → more delicate, elongated look, very elegant and refined

Neither is better; it’s about which feel matches your style and hand shape.

Best Ring Settings for Oval Diamonds

One reason oval cut diamonds are so popular is their ability to work with many ring designs. From minimal solitaires to detailed vintage-inspired styles, the oval adapts beautifully.

Here are some of the most-loved setting types:

Classic Solitaire

A simple band with a single oval center stone lets the diamond take center stage. Whether you choose yellow, white, or rose gold (or platinum), the oval’s shape and sparkle make a powerful statement without extra detail.

Vintage-Inspired Designs

Milgrain edges, engraved bands, and intricate galleries pair wonderfully with an oval. The gentle curves of the diamond echo the romantic details of vintage and antique-style rings, creating a ring that feels warm, nostalgic, and timeless.

Side-Stone & Three-Stone Rings

Ovals look stunning with side stones such as:

• Tapered baguettes
• Round brilliants
• Pear or marquise side stones

These designs add width and presence, drawing the eye into the center oval and creating a balanced, luxurious look.

Pavé Bands

A pavé band, lined with tiny diamonds, adds extra sparkle without taking focus away from the oval. The continuous shimmer along the band enhances the center stone and is perfect if you love a more glamorous style.

Halo Settings

A halo of small diamonds around the oval center stone:

• Boosts the overall sparkle
• Makes the diamond appear larger on the finger
• Adds a dramatic, “red-carpet” feel

Halos are a favorite for those who want maximum brilliance and a high-impact look without needing to jump up significantly in carat weight.

Oval Cut vs. Other Popular Diamond Shapes

To understand why so many people choose ovals, it helps to see how they compare with other common shapes.

Oval vs Round Brilliant

• Round: Perfect symmetry, classic look, highest overall demand.
• Oval: Same style of brilliant faceting, but with an elongated profile that feels more unique.

If you love the sparkle of a round but want something less traditional and more elongating on the finger, an oval is a great alternative.

Oval vs Cushion Cut

• Cushion: Square or rectangular with rounded corners; often deeper stones with a romantic, pillowy look.
• Oval: Uses more of the carat weight across the top, so it tends to look larger face-up.

Cushions can sometimes show a “crushed ice” style sparkle, while ovals usually offer more defined flashes of light and a stronger sense of spread.

Oval vs Emerald Cut

• Emerald: Step-cut facets, long flashes of light, emphasize clarity and structure over sparkle.
• Oval: Brilliant-style faceting, more sparkle and fire.

If you prefer a clean, architectural look with subtle reflections, an emerald cut may appeal to you. If you want a lively, sparkling diamond with a softer outline, the oval is usually more suitable.

Quick Comparison Overview

FeatureOval CutRound BrilliantCushion CutEmerald CutFacet StyleBrilliant-style, elongatedBrilliant-style, circularBrilliant or modified brilliantStep-cutOutlineOval / elongatedPerfect circleSquare/rectangular with soft cornersRectangular with straight edgesSparkle TypeStrong brilliance, flowing flashesMaximum all-around brillianceRomantic, sometimes “crushed ice”Broad, mirror-like flashesFace-Up SizeLooks larger per caratTrue-to-carat sizeCan look smaller due to depthModerate face-up areaStyle VibeElegant, modern-classicTraditional, timelessSoft, romanticSleek, refined, vintage-modern

Pros and Cons of Oval Cut Diamonds

Like any shape, oval diamonds come with both advantages and things to watch out for.

Benefits of Oval Cut Diamonds

1. Impressive size for the weight

The stretched outline gives you more visible diamond for the same carat, making ovals ideal if you want a stone that looks substantial without pushing your budget too high.

2. Flattering on the hand

The elongated design draws the eye along the finger, which many people find slimming and very elegant.

3. Brilliant sparkle

Because the cut is based on the round brilliant, ovals deliver excellent fire and scintillation, perfect for anyone who wants a lively, eye-catching ring.

4. Versatile style

From minimal solitaires to detailed halos and vintage settings, oval diamonds adapt easily to different design aesthetics.

Things to Watch For (and How to Avoid Issues)

1. Bow-Tie Effect

Many ovals show a darker band across the center known as a “bow-tie”. This isn’t always a flaw – a soft bow-tie can add character. The problem is when it’s too bold and makes the center area look shadowy.

How to avoid it:

• Choose well-proportioned stones with balanced length-to-width ratios
  
• Look at videos and real-life images to check how the diamond behaves in motion
  
• Work with a jeweller who can guide you towards ovals with minimal, non-distracting bow-ties
  

2. Visible Color and Inclusions at the Ends

Because the tips of an oval are more exposed, color and inclusions can sometimes be easier to see there.

How to manage this:

• Aim for slightly higher color grades if you want a very white look
• Choose clarity that is eye-clean (often VS2 or better, but always check the actual stone)
• Consider prong placements that sit over areas with minor inclusions

3. High Demand for Great Stones

Well-cut ovals are extremely popular, so the best ones can sell quickly and sometimes command higher prices than lower-quality stones.

How to handle this:

• Shop early if you have a specific deadline (like a proposal date)
• Be flexible with carat weight, color, or clarity as long as the diamond looks beautiful in person
• Choose a trusted jeweller with access to a broad selection of certified ovals

Final Thoughts: Is an Oval Cut Diamond Right for You?

An oval cut diamond is a fantastic choice if you’re looking for:

• Exceptional sparkle
• A larger appearance for the carat weight
• A shape that’s elegant, flattering, and a little different from the traditional round

By paying attention to cut quality, ratio, color, and clarity—and by choosing a setting that matches your style—you can find an oval diamond that feels personal, modern, and timeless all at once.

Whether you’re drawn to sleek solitaires, glittering halos, or vintage-inspired designs, an oval cut center stone will give your engagement ring a distinctive, graceful look that you’ll love for a lifetime.

Diamond Anatomy Explained: The Parts That Make Your Stone Sparkle

Every diamond is one of a kind, but beneath the surface, they all share the same basic structure. This diamond anatomy – the way each part of the stone is shaped and arranged – has a huge impact on:

• How much the diamond sparkles
• How big it looks face-up
• How bright or dull it appears in real life

In this guide, we’ll walk through the key parts of a diamond and why they matter. Once you understand the basic anatomy, you’ll be able to look beyond the 4Cs and judge a diamond with a much more trained eye.

What Do We Mean by “Diamond Anatomy”?

When jewellers talk about diamond anatomy, they’re simply describing the different sections that make up the stone and how they relate to each other.

Even though diamonds come in many shapes (round, oval, cushion, pear, etc.), most are built from the same “building blocks”:

• Top: table and crown
• Middle: girdle and diameter
• Bottom: pavilion and culet
• Overall: total depth and facet layout

How these parts are cut, angled, and polished determines how light travels through the diamond. Good anatomy means:

• Light enters the stone
• Bounces around efficiently
• Returns to your eyes as brilliance, fire, and sparkle

Poor anatomy lets light leak out from the sides or bottom, leaving the diamond looking flat or lifeless.

Cut grade on a certificate gives you a quick summary of how well these elements work together, but it doesn’t tell the full story. Knowing the parts of a diamond helps you understand why one stone looks more beautiful than another—even when they share similar grades.

The Main Parts of a Diamond (From Top to Bottom)

Let’s break down the essential elements of a typical faceted diamond.

1. Table

The table is the large, flat facet right at the top of the diamond.

• It’s the first surface light hits when it enters the stone.
• The size of the table is often expressed as a percentage of the diamond’s width (diameter).

A well-proportioned table helps balance brightness and fire. If the table is too large, the diamond can look glassy or washed out. If it’s too small, the stone may look dark or overly “busy”.

2. Crown

The crown is the upper section that sits between the table and the girdle. It consists of angled facets that act like tiny windows and prisms.

Two important aspects of the crown are:

• Crown height – the distance from the girdle up to the table
• Crown angle – the angle formed where the crown facets meet the girdle

These measurements influence how light bends as it enters and exits the diamond. A well-shaped crown helps create those flashes of colour (fire) and adds depth to the diamond’s appearance.

3. Girdle

The girdle is the thin band that runs around the widest part of the diamond. This is also the area where the stone is usually held in place by claws, prongs or a bezel.

Girdle thickness matters:

• Too thick → extra weight is hiding in the middle of the diamond instead of showing in the face-up size. You could be paying for carat weight you can’t really see.
• Too thin → the edge of the diamond becomes fragile and more prone to chipping, especially during setting or daily wear.
• Ideal → a girdle that is medium to slightly thick is generally preferred for both durability and beauty.

On grading reports, you’ll often see the girdle described with terms like “thin”, “medium”, “slightly thick”, etc.

4. Diameter

For round and many other shapes, the diameter is simply the measurement across the widest part of the stone, from one side of the girdle to the other.

You’ll see it listed as:

• A single number (for round diamonds), or
• A length × width (for fancy shapes)

The diameter (or length and width) tells you how large the diamond looks from above—often more meaningful than carat weight alone when you care about visible size on the hand.

5. Pavilion

The pavilion is the lower section of the diamond, running from just under the girdle down to the very bottom point (or culet).

Two key measurements here:

• Pavilion depth – how tall this bottom section is
• Pavilion angle – the angle of the facets that slope down from the girdle

If the pavilion is:

• Too shallow – light escapes out of the bottom, and the diamond can look pale or glassy.
• Too deep – light gets trapped or leaks out at odd angles, making the stone darker in the center.

When the pavilion is cut within good ranges, it helps light bounce back up through the crown, creating strong brilliance.

6. Lower Girdle / Half Facets

The lower girdle facets (sometimes called “lower halves”) are the small facets that sit on the pavilion near the girdle.

The length of these facets, compared to the total pavilion height, affects:

• The contrast pattern inside the stone
• The style and intensity of sparkle
• How crisp or soft the scintillation appears
• Longer lower halves tend to create more, finer flashes of light.
• Shorter lower halves can create chunkier, broader flashes.

This is a more advanced detail, but if you like to get technical, it’s one of the reasons two diamonds with similar grades can still look very different when they move under light.

7. Culet

The culet (pronounced “cue-let”) is the very bottom of the diamond. Traditionally, it can be:

• A tiny facet, or
• A sharp point with no visible facet

On modern diamonds, the culet is usually so small that you won’t notice it without magnification. That’s what most buyers prefer.

• Very large culets can look like a small hole or dot at the bottom of the stone.
• A big culet also lets some light leak out, which reduces overall brilliance.

On grading reports, you’ll see descriptions like “None”, “Very Small”, “Small”, etc. “None” or “Very Small” is usually ideal for contemporary styles.

8. Total Depth

Total depth measures the height of the diamond from the table all the way down to the culet. It is often expressed as a percentage of the diamond’s diameter (for round) or its width (for other shapes).

Depth has a major influence on:

• How large the diamond appears face-up
• How well it reflects light
• Too deep → the diamond may look smaller than its carat weight suggests and can appear darker.
• Too shallow → light leaks from the sides and bottom, causing a dull or “watery” look.

A balanced depth works together with the other proportions to maximise beauty and brightness.

Why Understanding Diamond Anatomy Matters

Knowing the parts of a diamond isn’t just theory—it’s practical:

• You’ll understand why some diamonds with equal carat, color, and clarity can look totally different in person.
• You’ll be able to spot stones that are carrying “hidden” weight in the girdle or depth instead of giving you more visible size.
• You’ll appreciate cut and proportion as the real drivers behind sparkle, not just the numbers on the certificate.

When you’re choosing a diamond—especially for an engagement ring—remember:

• Cut and anatomy work together to create fire, brilliance, and scintillation.
• A well-designed diamond structure makes the most of every facet.
• Once you recognise the table, crown, girdle, pavilion, culet and depth, you’ll feel much more confident asking questions and comparing options.

In short, understanding diamond anatomy helps you choose a stone that doesn’t just look good on paper, but truly shines in real life.

Understanding Diamond Sparkle: Fire, Brilliance & Scintillation

When a diamond truly “comes to life” on your hand, it’s not an accident—its sparkle is the result of how it interacts with light. In simple terms, a diamond’s sparkle is created by three key effects working together:

• Brilliance (white light return)
• Fire (rainbow flashes of colour)
• Scintillation (the on/off twinkling as the stone moves)

Once you understand these, it becomes much easier to choose a diamond that looks bright, lively, and full of character.

What Is Fire in a Diamond?

Fire is the colourful, rainbow-like flashes you see when a diamond is exposed to light.

When light enters the stone, it bends and separates into different wavelengths, much like light through a prism. As the light exits through the top of the diamond, you see tiny streaks of red, blue, green, and other colours.

Fire is influenced by:

• The diamond’s cut and angles
• The quality of the polish
• The lighting conditions (spotlighting often brings out more fire)

Diamonds with strong fire feel lively and dynamic, especially under direct or changing light.

What Is Brilliance?

Brilliance is the bright white light that reflects back to your eye when you look at a diamond.

It comes from the way light enters the diamond, bounces off the internal facets, and returns through the top. High brilliance gives the stone:

• A clean, bright look
• Strong contrast between light and dark areas
• That “light-up” effect even in normal, everyday lighting

If a diamond lacks brilliance, it can appear flat, dull, or “sleepy” even if its color and clarity grades look good on paper.

What Is Scintillation?

Scintillation is the pattern of sparkle you see when the diamond, the light source, or your viewpoint moves.

You can think of it as:

• Tiny flashes turning “on” and “off” across the surface
• A checkerboard-like play of light and shadow

Scintillation is what makes a diamond look alive when you move your hand. Two types are often discussed:

Flash vs. Fire Scintillation

• Flash scintillation
  Primarily white flashes of light
  Often seen in shapes with larger, broader facets (such as emerald or some radiant cuts)
  Creates bold, mirror-like reflections
• Fire scintillation
  Coloured flashes (red, blue, green, etc.)
  More common in cuts with many smaller facets (like round brilliant or some oval cuts)
  Gives a highly “sparkly”, glittery effect

Different shapes and facet layouts have different personalities:

• Brilliant cuts (round, oval, pear, radiant) usually show fast, lively scintillation with lots of small, quick flashes.
• Step cuts (emerald, Asscher) tend to display slower, larger flashes, creating a more refined, window-like effect.

Other gemstones, like moissanite, often show stronger coloured fire than diamonds, especially in certain cuts. Some people love this; others prefer the more balanced mix of white and coloured light found in diamonds.

How the 4Cs Influence Sparkle

You can use the 4Cs—cut, color, clarity, and carat weight—to increase the amount and quality of sparkle you see. Two of these matter most for sparkle: cut and clarity.

Cut: The Sparkle Engine

Cut is the single biggest factor in how much a diamond shines.

In a well-cut diamond:

• Facets are positioned and angled to keep light bouncing inside the stone
• Pavilion depth and angles are balanced so light returns through the top instead of escaping
• Both fire and brilliance are maximised
  

In a poorly cut diamond:

• Light leaks out of the bottom or side
• Brightness drops, and the stone can look dark in the centre or around the edges
• Sparkle is weak, even if colour and clarity are high

Facet style also matters:

• Brilliant-style cuts (round, oval, pear, radiant, princess, etc.) → generally offer maximum sparkle thanks to many facets.
• Step cuts (emerald, Asscher) → prioritise clarity and sleek flashes over intense glitter.

If sparkle is a priority, always prioritise cut quality first.

Clarity: Keeping Light Pathways Clear

Clarity refers to the presence of internal marks (inclusions) or external marks (blemishes). While some inclusions are harmless visually, larger or poorly placed ones can:

• Interrupt the flow of light through the stone
• Reduce brilliance and overall sparkle
• Draw the eye away from the diamond’s natural beauty

For a diamond that sparkles well:

• Look for stones that are eye-clean – meaning no inclusions visible without magnification.
• In many cases, VS2 or SI1 can still be eye-clean if inclusions are small and well positioned.

As long as the diamond is well cut and appears clean to the naked eye, it should perform beautifully.

Final Thoughts: How to Choose a Truly Sparkling Diamond

Not all diamonds sparkle in the same way. Some emphasise bold white flashes, others show more rainbow colour, and some offer a softer, more subtle glow. The “best” sparkle is ultimately the one that matches your personal taste.

To find a diamond that truly dazzles:

• Make cut your top priority – better cut = better light performance.
• Choose eye-clean clarity so inclusions don’t block or dull the light.
• View the diamond in different lighting conditions and from different angles to see how brilliance, fire, and scintillation show up in real life.

When these elements come together, you get that mesmerising, dancing sparkle that makes a diamond feel special every time it catches the light.

Diamond Symmetry Guide: Why It Matters for Sparkle and Beauty

When you’re choosing a diamond, you’ll hear a lot about cut, color, clarity and carat. But tucked inside the “cut” discussion is another key concept: symmetry.

Symmetry is one of those quiet details that doesn’t sound exciting at first—until you realise how much it influences sparkle, balance, and overall elegance.

This guide breaks down what diamond symmetry is, why it matters, and how to use it when picking your center stone.

What Is Diamond Symmetry?

When jewellers talk about symmetry, they’re not just asking whether the stone looks the same if you split it straight down the middle.

In diamond grading, symmetry refers to how precisely all the facets are placed and aligned with each other. It’s about:

• Do the facets meet at clean points?
• Is the table centred?
• Are the crown and pavilion balanced and lined up correctly?
• Is the culet (the very bottom point) in the right place?

A diamond with good symmetry has a harmonious, well-organised facet pattern. One with poor symmetry has misaligned or oddly shaped facets that disturb the way light travels through the stone.

Why Is Diamond Symmetry Important?

Symmetry directly affects how light moves in and out of the diamond. That, in turn, impacts:

• Brilliance – the bright white light return
• Fire – flashes of colour
• Scintillation – the sparkle that appears when the diamond or light source moves

When symmetry is strong:

• Light enters through the top
• Reflects cleanly around the stone
• Returns in a focused, lively way

When symmetry is poor:

• Light may leak out through the bottom or sides
• Dark areas, uneven sparkle, or a “messy” pattern can appear
• Any colour tint or visible inclusions can look more obvious because the overall light performance is weaker

In simple terms: better symmetry = more balanced, refined sparkle.

Symmetry and Cut Grade: How They’re Connected

Symmetry isn’t one of the “4Cs” by itself, but it is a big part of overall cut quality.

On a grading report, you’ll often see both cut grade and separate grades for symmetry (and polish), usually on a scale such as:

• Excellent
• Very Good
• Good
• Fair
• Poor

Typically:

• Diamonds with Excellent cut will have Excellent or Very Good symmetry.
• Very Good cut stones may have tiny symmetry deviations that are only visible under magnification.
• Stones with Fair or Poor cut often have noticeable symmetry issues: off-center tables, irregular facets, or misaligned points.

If you want a diamond that looks sharp and bright in everyday wear, aim for symmetry in the Very Good or Excellent range, especially for a center stone.

What Causes Poor Symmetry?

Symmetry problems usually come from how the diamond was cut and finished. Common issues include:

• Off-center table – the table isn’t positioned in the middle of the stone
• Misplaced culet – the bottom point or facet is not aligned with the center
• Uneven facets – some facets are longer, shorter, or oddly shaped compared to their neighbours
• Facets that don’t meet cleanly – points are “broken”, mismatched or slanted
• Tilted or uneven crown and pavilion – the top and bottom sections of the diamond don’t line up properly

Most of these flaws are subtle and only visible at 10x magnification—but when there are enough of them, they degrade the way the diamond handles light.

How Can I Tell If My Diamond Has Good Symmetry?

The most practical way is to check the grading report. Look for:

• Symmetry: Excellent or Very Good for engagement ring centres
• Cut grade: Excellent / Ideal or Very Good

In general:

• Excellent symmetry
  Well-centered table and culet
  No extra or missing facets
  Facets line up cleanly and evenly
• Very Good symmetry
  Minor irregularities that are typically invisible to the naked eye
  Small facet misalignments or slightly uneven shapes that don’t affect beauty in normal viewing
• Fair or Poor symmetry
  Noticeable misalignment
  Off-center table or culet
  Odd facet shapes that can cause uneven light return and dull areas

If you’re viewing the stone in person or via high-resolution video, a well-symmetrical diamond will show a neat, balanced pattern when you look straight down through the table.

How Does Symmetry Affect Price?

Symmetry is evaluated under 10x magnification, so small differences in grade don’t always translate into visible differences to the naked eye.

In terms of pricing:

• Diamonds with Excellent symmetry often carry a premium, especially in popular shapes like round brilliants.
• Very Good symmetry can sometimes look virtually identical in real life but cost slightly less.
• Going down to Good or below may lower the price, but can also reduce sparkle or create a less refined appearance.

For many buyers, the sweet spot is:

• Excellent cut
• Excellent or Very Good symmetry

If budget is tight, choosing Very Good symmetry over Excellent can be a smart way to save without sacrificing beauty—provided the diamond still looks visually balanced and bright.

Do I Always Need Perfect Symmetry?

Not necessarily.

• For a round brilliant center stone, symmetry matters a lot. The entire look relies on clean, even facet patterns.
• For fancy shapes (oval, pear, radiant, cushion, etc.), there’s more personal preference involved. Slight asymmetries might not be noticeable once the stone is set and can be acceptable if the diamond still looks beautiful.

The key is what you see:

• Does the diamond look balanced?
• Does it sparkle evenly when you move it?
• Are there any distracting dark patches or “wonky” areas when viewed face-up?

If it looks bright, harmonious, and pleasing to the eye, you don’t always need to chase absolute perfection on paper.

Final Thoughts: Why Symmetry Is Worth Paying Attention To

Symmetry may feel like a technical detail, but it quietly shapes how your diamond performs and how polished it appears overall.

A stone with strong symmetry will:

• Reflect light in an orderly, balanced way
• Enhance brilliance and fire
• Look more refined and “finished” from every angle

Since an engagement ring is something you’ll wear for years, choosing a diamond with high-quality symmetry—ideally Very Good or Excellent—helps ensure you’ll enjoy a stone that continues to look stunning every time it catches the light.