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Home > Colorless Diamonds > Oval Cut Diamond

Home > Colorless Diamonds > Oval Cut Diamond

Home > Colorless Diamonds > Oval Cut Diamond

Oval Cut Diamond
Oval Cut Diamond
Oval Cut Diamond
Oval Cut Diamond.

What Is An Oval Cut Diamond? - Buying Guide


The ever flattering oval shape is symmetrical and exhibits a similar fire and brilliance to round shaped diamonds. A scintillating twist on the classic round brilliant, the elongated shape can create the illusion of larger size. Oval diamonds are highly versatile, remarkably elegant, and distinctive.

Oval Cut Diamond

Oval Cut Diamond.


Created by Lazare Kaplan in the 1960's, oval diamonds are a modified brilliant cut (like virtually all round cuts). Because the two shapes possess a similar fire and brilliance, the oval is an ideal choice for a customer who likes the look of a round diamond, but wants something more unique. The slender shape can also make the finger of the wearer appear longer and slimmer, an effect often desired.

Oval Cut Diamond Buying Guide


Somewhere in between the ROUND BRILLIANT AND THE PEAR SHAPE


Oval Cut Diamond Quick Guide


Unique Features
Symmetrical, elongated rounded shape
Facets
Usually 58
L/W Ratio
Typically 1.33 - 1.66
Origin
19th Century
Expert Tip
Optimises carat weight and elongates finger


Oval Cut Diamond Ring


Oval Cut Diamond Ring
Oval Cut Diamond Ring.


Oval Cut Diamond Features



Oval Cut Diamond Features

Oval Cut Diamond Features.


The oval cut is a rounded shape typically comprised of 58 facets with a typical ratio between 1.33 and 1.66.

Somewhere in between the round brilliant and the pear shape, the oval cut is the perfect choice if you are wishing to savour the sparkle of the round brilliant in a slightly rarer and more elongated form.

A "bow-tie effect" occurs when light passing through the diamond casts a shadow across the central facets of the stone. This shadow can be reduced by altering the depth of the pavilion, and adjusting the angles of the table and facets to better diffuse light in the central area. This effect also occurs in the pear, marquise and heart shapes.

Oval Cut Diamond Expert Guide


Ratio is an important aspect to consider with the oval shape as it can have a significant impact on both the light dispersion within the stone and the appearance of the finger. When selecting an oval shape it is important to reconcile the relative benefits of the longer shape (larger ratio) and the more rounded shape (smaller ratio). The former will better elongate the finger, while a more rounded shape will better prevent the bow-tie effect.

Preferences vary on how narrow or fat an oval cut diamond should be, so choose what appeals to you personally (though a length to width ratio of 1.35 - 1.50 is considered the classic oval cut). A slightly thinner cut may look most appealing in a setting where the diamond is flanked by side stones.

The chart below serves as a general guideline for evaluating the cut of an oval diamond:

Oval Cut Diamond - Cut Guide



Swipe left to see more.
Oval Cut Diamond Excellent Very Good Good Fair Poor
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Diamond Depth %

Depth refers to the distance between the culet and the table when a diamond is viewed from the side.

The depth % of a diamond is calculated by dividing the depth of the diamond by the width of the diamond. So, if a diamond is 3 mm in depth, and 4.5 mm in width, its depth % is 66.7.

The lower the depth %, the larger a diamond of a given carat weight will appear when viewed from above (since more of the diamond's size is in its width vs. in its depth).

Depth % is incorporated in the cut grade of a diamond. For this reason, when purchasing a diamond, use the cut grade first (since it balances multiple measurements, not just depth %). Once two diamonds of equal cut are being compared, consider depth % as a further refinement.

Learn more about the anatomy of a diamond.

58 - 62 56 - 57.9 or 62.1 - 66 53 - 55.9 or 66.1 - 71 50 - 52.9 or 71.1 - 74 <50 or >74
×
Diamond Table %

The table is the uppermost, flat surface of a diamond, which runs parallel to the plane of the girdle.

The table % of a diamond is calculated by dividing the width of the table facet by the width of the diamond. So, if the table facet is 3 mm across, and the diamond is 4.5 mm wide, its table % is 66.7.

Table % is incorporated in the cut grade of a diamond. For this reason, when purchasing a diamond, use the cut grade first (since it balances multiple measurements, not just table %). Once two diamonds of equal cut are being compared, consider table % as a further refinement.

Learn more about the anatomy of a diamond.

53 - 63 52 or 64 - 65 51 or 64 - 65 50 or 69 - 70 <50 or >70
×
Diamond Symmetry

A diamond's symmetry is the arrangement, size, and shaping of diamond's facets. The facets are the flat planes that run along the surfaces of the diamond. Symmetry is angles and lines that form the placement of the facets. Nowadays, symmetry is completely controlled by the manufacturing process. Machines very carefully cut diamonds to produce the most accurate shapes. However, at times the diamond cutter will leave a symmetry imperfection in the diamond in order to prevent a different inclusion from showing in the finished diamond. Symmetry is a subset of the diamond's cut grade.

Learn more about diamond symmetry.

Good to excellent Good to excellent Good to excellent Fair to Excellent Poor to Excellent
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Diamond Polish

The term "polish" refers to the overall condition of the surfaces of a finished diamond. A rating is assigned based on the amount of polishing lines that are visible. These polishing lines are caused by very small diamond crystals which are embedded in the polishing wheels used by diamond cutters to polish the surface of the diamond after cutting. Diamond polish is important because it can affect the degree to which light is able to pass through a diamond, rendering it more or less brilliant. Diamonds that are laboratory certified with a good, very good, or excellent polish rating are the most desirable. Diamonds that have poor polish will be less brilliant and not as desirable or valuable. Reputable jewellers diamonds are graded after examining the diamond facet by facet.

Learn more about diamond polish.

Good to excellent Good to excellent Good to excellent Fair to Excellent Poor to Excellent
×
Diamond Girdle

The girdle is the outer edge of the diamond, where the crown (top) meets the pavilion (bottom).

A girdle may be faceted (a series of tiny polished sides going around the diamond), bruted (a single continuous unpolished surface going round the diamond; no longer common), or polished (a bruted girdle that has been polished smooth). Whether a girdle is faceted, bruted, or polished usually has no impact on the appearance or value of the diamond.

The girdle is described according to its width. Often, the width of the girdle varies at different points around the diamond, and is quoted in a range designating the thinnest and thickest point along the girdle (e.g. "Thin - Medium" means the diamond's girdle varies in width from thin at the narrowest point to medium at the widest point).

Learn more about the anatomy of a diamond.

Very Thin - Slightly Thick Very Thin - Slightly Thick Very Thin - Thick Very Thin - Very Thick Ex. Thin - Ex. Thick
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Diamond Culet

The culet (pronounced cue-let) is the small area at the bottom of a diamond's pavilion. The culet can be a point or a very small facet sitting parallel to the table.

The culet size as determined by the GIA, is shown using the following scale:

None, Very Small, Small, Medium, Slightly Large, Large, Very Large.

Any culet size of Medium or smaller will be invisible to the naked eye, and have no negative impact on a diamond's appearance. However, if a culet is Slightly Large or larger, it may allow light entering from the crown to pass straight through the culet facet, reducing the diamond's brilliance. This may also make the culet appear as an inclusion, or create a dead area on the diamond where the light is escaping through the bottom.

Learn more about the anatomy of a diamond.

None Very Small Small Medium > Medium
×
Diamond L/W Ratio

The length to width (L/W) ratio is calculated by dividing a diamond's length (the longer measure) by its width (the shorter measure that runs perpendicular to length).

For example, an Oval Cut diamond that is 5.00 mm in length and 3.3 mm in width will have a L/W ratio of 1.50 (5.00/3.33). A perfectly round or square diamond will have a length to width ratio of 1.00, but many will be off slightly since they are often not perfectly cut. Any L/W ratio of 1.05 or less will appear perfectly round or square to the naked eye.

L/W ratio is more commonly used in fancy shapes. There is no "ideal" L/W ratio in a fancy shape diamond. What is important is what looks pleasing to you.

1.35 - 1.50 1.30 - 1.34 or 1.52 - 1.55 1.25 - 1.29 or 1.56 - 1.60 1.20 - 1.24 or 1.61 - 1.65 <1.20 or >1.65

Oval Diamond Cut Guide.


Evaluating color in oval diamonds is subjective. Keep in mind that many buyers may actually prefer the ever so slightly warmer colors of a G-H diamond over the cool colorlessness of a D-F diamond. In fact, most of the premium in price associated with oval diamonds at the higher end of the color scale is driven by supply and demand; customers want the D-F color grades, and are willing to pay a premium to get them. In a world without diamond color grading, the price premium for higher grades would be much lower, as the actual differences in color are difficult to perceive. The color chart below provides a general guide for evaluating color in oval diamonds:

Oval Cut Diamond - Color Guide



Swipe left to see more.
Oval Cut Diamond Excellent Very Good Good Fair Poor
< .50 ct. D - G H - I J - K L - M > M
.51-1.0 ct. D - F G H - I J - K > K
1.0-2.0 ct. D - F D - F G - H I - J > J
>>2.0 ct. D - F D - F G H - I > I
×
Diamond Fluorescence

Fluorescence refers to a diamond's tendency to emit a soft colored glow when subjected to ultraviolet light (such as a "black light"). Roughly 30% of diamonds fluoresce to some degree.

Colorless (D-F) fluorescent diamonds sell at up to a 15% discount since the fluorescence is perceived as a defect, even though the visible effects of Faint to Medium fluorescence are perceptible only to a gemologist using a special UV light source.

Because the fluorescent glow is usually blue (which is the complementary color to yellow) fluorescence can make diamonds of I-M color appear up to one grade whiter. For this reason, I-M diamonds tend to sell at a slight premium when they possess Medium to Very Strong fluorescence.

Exercise caution in purchasing a diamond with Strong fluorescence in D-F color diamonds or Very Strong fluorescence in G-H color diamonds (which do not possess enough body color to offset the higher degree of fluorescence).

Learn more about diamond fluorescence.

None Faint - Med Strong Very Strong Very Strong

Oval Diamond Color Guide.


Like color, evaluating clarity in oval diamonds is subjective. GIA provides excellent help with their clarity grades. Still, it is important to understand that each customer will have a unique standard for clarity. Some may be perfectly comfortable with an inclusion as long as they cannot easily see it. Others may insist on a more technically flawless appearance. The clarity chart below provides a general guide for evaluating clarity in oval diamonds:

Oval Cut Diamond - Clarity Guide



Swipe left to see more.
Oval Cut Diamond Excellent Very Good Good Fair Poor
< .50 ct. FL - VS2 SI1 - SI2 I1 I2 > I2
.51-1.0 ct. FL - VS1 VS2 - SI1 SI2 I1 - I2 > I2
1.0-2.0 ct. FL - VVS2 VS1 - VS2 SI1 - SI2 I1 > I1
> 2.0 ct. FL - VVS2 VS1 - VS2 SI1 SI2 > SI2

Oval Diamond Clarity Guide.


Oval Cut Diamond History & Background


Although oval shaped diamonds were first introduced over 200 years ago, the modern oval cut was invented in the early 1960s by leading Russian cutter Lazare Kaplan. The cut eventually earned him a place in the Jewellers International Hall of Fame, however, Kaplan also left his mark on the diamond industry with his unique ability to split a rough diamond into smaller stones with a single blow. This process is known as cleaving.

When a rough material is poorly shaped or contains defective flaws that prevent it from being turned into a single stone, it must be split along the grain. Kaplan became famous for his expertise in taking stones that were otherwise deemed unworthy and transforming them into beautifully cut diamonds.


Oval Cut Diamond History

Oval Cut Diamond History.


Learn more about what you need to know in our, ultimate buying guide, if you're thinking of buying a oval cut diamond. We break it all down from pricing, other shapes comparison and engagement ring setting choices.



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