3 Carat Cushion Cut Diamond Engagement Rings

There are many styles and designs of 3-carat cushion cut diamond engagement rings. You can select the perfect ring for your special occasion and personal style or have your engagement ring custom-made by your jewelry designer. Cushion diamonds have incredible brilliance and sparkle, making them the perfect choice for engagement rings. However, before choosing your ring, consider the carat weight of the center stone and the setting you want.

The three-carat cushion cut diamond is a classic choice for fine jewelry. Its elongated shape gives it an extra spread and looks like crushed ice. Squared cushions are usually more profound but have a smaller overall look. For the best sparkle, choose a cushion cut with a depth percentage and table percentage under 70 percent. Then, your diamond will look beautiful in any setting. There are many settings for this shape, but it’s best to choose one that matches your budget and style preferences.

3 Carat Cushion Cut Diamond Engagement Rings

In its setting, the carat weight of a 3-carat diamond should remain white. A G-grade diamond will remain white in its setting, whereas a K-grade diamond will only remain white in a dark setting. A yellow tint usually distinguishes a K-color diamond, but the contrast makes the diamond appear clear when set in a jeweler. A smaller stone should suffice if your budget doesn’t allow for a diamond of this size.

Cushion-Cut Diamond

A cushion-cut diamond combines a more modern and round brilliant-cut diamond with a classic, old mine facet pattern diamond cut. This type of diamond typically has a soft square or even rectangular shape, all with curved edges.

A cushion cut diamond combines a square cut with rounded corners, giving it an appearance similar to a pillow. This is where the “cushion cut” name comes from.

Here’s an example of a stunning cushion cut from Blue Nile’s Astor Cutline. Cushion-cut diamonds are often purchased for engagement rings, and they’re also commonly used in some fashion pieces.

The price of a cushion-cut diamond is typically significantly less than the cost of a brilliant round diamond. However, due to the increasing popularity of cushion-cut diamond rings, these prices may vary and rise significantly.

3.00ct Cushion Cut Diamond Engagement Rings

Engagement Rings from Diamond Heaven. Shop our collection of enchanting engagement rings at Diamond Heaven and give your partner the perfect proposal.

Our stunning collection of engagement rings is available in various settings and styles. You will be sure to find the perfect engagement ring from white gold solitaire rings to raise gold diamond rings.

All our engagement rings are completely customizable so that you can give your partner the ring of their dreams. Get engagement rings with 0 percent finance and a 12-month warranty on all rings. This includes wedding rings too.

Please book a consultation with our specialists and view our engagement ring collection in person at one of our showrooms. We have several showrooms in the UK; Birmingham, London, Manchester, Glasgow, and Cardiff.

At Diamond Heaven, we’ll be sure to help you find the perfect engagement ring you’ve always dreamed of.

A Cushion Cut Diamond Ring at the Right Price

Various factors determine the cost of a cushion-cut diamond ring. The carat weight of the diamond, the diamond’s cut, color and clarity grades, and the setting style you choose all have a significant impact.

Generally, the price of a 3-carat diamond is between $19,000 and $95,000, though some are priced at more than $100,000. The cost of a 3-carat diamond engagement ring depends on several factors, including Cut quality, Clarity, Color, and Shape.

You can expect to pay around $3,500 for a 1 Carat Cushion Cut Diamond with a color grade of H and a clarity grade of SI1 (like this 1ct Cushion-cut from James Allen). In addition, a setting can cost anywhere from $500 to $1500 to complete your ring.

Similarly, you can strive for higher grades in these areas at a higher cost. For example, this 1.01 carat F/VVS2 Cushion Cut Diamond costs $5,476. However, when compared to a diamond several grades lower, this will not give you a significant increase in beauty when viewed with the naked eye.

A 12-carat Cushion Cut Diamond (with H/SI1 grades) should cost between $700 and $1000, depending on the carat size. A 2-carat Cushion Cut should cost between $17,000 and $19,000.

Engagement Rings

At Diamond Heaven, we only use ethically sourced diamonds when creating your engagement rings. All cut diamonds are crafted with the 4Cs in mind (Cut, Clarity, Color & Carat), based on your specifications, to create a beautiful and timeless piece that has an unforgettable sparkle.

Diamond Cushion Color

Cushion cuts are one of the worst shapes for color retention (or one of the best, if you’re a fancy color diamond manufacturer).

The two most popular diamond shapes in the fancy color diamond market are cushion and radiant. These shapes are the polar opposite of rounds, which are the best at concealing their color.

As a result, unless the cushion cut is set in yellow or rose gold, I advise my readers to stick with H or better when purchasing a cushion cut (in which case, you can go down to J or K).

H diamond color is a cost-effective choice, and it’s also one of the most popular options due to its cost-effectiveness compared to a natural diamond color. Each color grade has a significant price difference, with H falling somewhere in the middle.

H diamonds aren’t entirely colorless, but they’re “near-colorless” with only a slight yellow tint. Especially if the diamond is set in rose or yellow gold, almost no one will notice the difference.

Clarity of Cushion Diamonds

Cushion cuts can be challenging in terms of diamond clarity. First and foremost, you must decide whether you want a crushed-ice cushion or an “antique” cushion. The reason for this is that the crushed-ice appearance, in any shape diamond, is an excellent hider of inclusions.

Furthermore, if you’re looking to buy a marquise or pear-shaped diamond, it’s always best if the inclusions are in the corners, as they’ll be heavily masked by the crushed ice that’s common in these shapes’ corners.

Of course, you’ll only know what kind of cushion look you’re getting if you can see a picture of the diamond in question, so you’ll be able to check the diamond’s clarity. As a result, aim for the lowest clarity you can find while maintaining eye cleanness.

Kobelli Cushion-cut Moissanite Engagement Ring 3 CTW 14k White Gold (8.5mm)

Amazon button


  • The Center stone is an 8.5mm Genuine Kobelli Moissanite
  • Features a 14k white gold and diamond setting
  • Moissanite center stone measures 8.5mm
  • Made in the USA with Eco-Friendly 100% Conflict-Free Materials. Designed and manufactured by Kobelli from Los Angeles, California.
  • Proposal-ready ring box included

Is 3 Carat Diamond too Big?

3-carat diamonds are generally large enough that a lower quality cut can upset the overall look. You should restrict your search only to those of excellent grade or better when shopping for 3-carat diamonds. The four shapes that appear to be the largest per carat are marquise, pear, oval, and emerald diamonds (in order of appearance). Oval diamonds are a popular choice among those who want a classic-style engagement ring while also wanting to maximize the size of their engagement ring’s center diamond.

Are Cushion Diamonds Worth it?

Then, cushion cut diamonds are still quite brilliant but are less brilliant than round diamonds. However, they also tend to have more fire due to their more significant facets. Many people love the high fire of a cushion-cut diamond, while others prefer the high overall brilliance of round diamonds. The most common carat size chosen by people is 0.3 carats, and its popularity stems from a large number of designs available for a 0.3-carat diamond. Unlike a giant diamond, a small diamond is lighter in weight and requires less support to keep it in place, giving the jeweler more design options.

Are Cushion Cut Diamonds Cheaper?

Cushion-cut diamonds tend to be about 25 percent less expensive than their round-cut counterparts. When jewelers cut a rough stone, more is lost in shaping a round diamond, so the cost of each carat retained is higher. Cushion cut diamonds are typical Because more material is lost when jewelers shape a rough stone into a round diamond, the cost of each carat retained is higher.

Do Cushion Cut Ring Carats Make a Difference?

When looking at the carat weight of a cushion-cut diamond, you’ll notice that there can be significant price differences due to the emphasis on the carat weight.

A diamond’s carat weight is how much the diamond weighs. Because a larger diamond is typically more sought after for a diamond engagement ring, for example, and is more desirable than a smaller diamond, the price points begin to rise with increased weights.

Take a look at this simple comparison to a US quarter if you’re not sure how big different carat weights of a cushion cut are (different L: W ratios aside).

How Much Does a 3ct Diamond Cost?

 3-carat diamonds are highly desirable for diamond engagement rings because they are noticeably large but not overbearing on the hand. A diamond of this carat weight will range from $30,000 – $120,000 for an individual stone 3-carat diamonds can cost anywhere from $19,000 to $95,000, and even more in some cases. Because 3ct diamonds are rare, larger than average, and highly sought after, they command a high price per carat.


The quality of a 3-carat diamond engagement ring will be determined by the stone’s quality, as a larger stone will show imperfections more readily. However, if you don’t mind being seen, choose a stone with high-quality diamonds. The average diameter of a 3-carat diamond is 9.1 millimeters, and it weighs 0.6 grammas, making it an attractive option for engagement rings. Marquise cuts are beautiful, but they’re not too big. They’re usually deeper than other cuts, but they’re not as big. When the diamond is turned face-up, the long, elongated shape maximizes the size of the stone, making it appear smaller. A three-carat marquise diamond will typically be 14mm long and seven wide. An “ideal cut” has a total carat weight of three carats and is the ideal cut.