3 Carat Diamond Ring: How to Get the Perfect Engagement Ring

Shopping for a 3 carat diamond engagement ring? Learn how much you can expect to pay and smart tips you need to know to get the best diamond for the money.

A 3 carat diamond is the ultimate showstopper. And as long as you know what you're doing when buying one, you can end up with a diamond truly the center of attention in any room.

That's where we can help. We're going to show you how to get the best 3 carat diamond for your budget. Consider reputable online retailers like Blue Nile and James Allen. These stores offer high-quality images and videos of their gems so shoppers know what they're getting.

In this guide, you'll learn:

• How Much Does a 3 Carat Diamond Cost?
  
• Natural vs Lab 3 Carat Diamond Price
  
• How Big is a 3 Carat Diamond?
  
• Smart Tips for Shopping for a 3 Carat Diamond

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How Much is a 3 Carat Diamond?

In general, you can expect to pay $40,000 - $50,000 for a good value 3 carat natural diamond. If you're okay with a lab diamond, you're looking at the $12,000 - $15,000 range.

The price per carat increases exponentially. A 3-carat diamond is not simply three times the price of a 1-carat diamond. It's more like 10 times the price.

Diamond Price vs Carat © CreditDonkey

This is because it's extremely rare to find a piece of rough material good enough to be cut into a 3-carat diamond. If you're deciding between a 2 carat or 3 carat stone, check out our guide for 2 carat diamond ring.

A 3-carat stone can cost anywhere between $20,000 to $240,000. The price depends on the quality of the stone. Flawless and colorless 3-carat diamonds will cost many times more than diamonds with visible flaws and a yellow tint.

Let's look at a couple of real examples:

Screenshot from James Allen Website

The colorless, almost flawless diamond on the left costs close to 6 figures. But you don't need to spend anywhere near that to get a beautiful 3-carat diamond.

The diamond on the right represents a good balance. We recommend ideal cut, VS2 clarity, and color H for a sparkling, eye-clean, white looking diamond. It's unlikely that anyone will be able to tell the difference.

Here are some prices to keep in mind for the most popular shapes:

• Round: $40,000+
  
• Princess: $35,000+
  
• Oval: $32,000+ (note: cut not graded)
  
• Cushion: $31,000+

3 Carat Diamond Price Charts

Here are detailed price charts of the current average retail price of 3-carat diamonds. Just click on the tabs for the shape you're looking for.

Fancy shape diamonds can cost as much as 40% less than a round diamond. Oval, asscher, and marquise cuts are pricier, but they are still as much as 15% less than a round diamond. Emerald and cushion cuts tend to be the least inexpensive. This may help you afford a 3-carat diamond on a smaller budget.

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3 Carat Diamond Price Calculator

Use this calculator to search for current prices of 3 carat diamonds on the market today.

Natural vs Lab Created 3 Carat Diamonds

As you can see, a 3 carat diamond is quite a splurge. If you don't have the budget, opting for a lab created diamond is a more affordable way to get a large stone.

Lab diamonds are real diamonds with identical chemical and physical properties as those created from the earth. But because they're made in labs, lab diamonds are now up to 60% - 70% cheaper than natural mined diamonds.

Here are some real examples of natural vs lab 3-carat diamonds prices.*

*Pricing information from in-stock diamonds on James Allen as of 10/29/21. James Allen is one of our favorite online diamond retailers. It offers competitive pricing and a large selection of certified diamonds.

How Big is a 3 Carat Diamond?

A 3-carat diamond can cost almost 10x more than a 1-carat diamond of the same specs. But its surface area is really just about double the size. Here's an illustration to show how a 3-carat diamond looks on a finger compared to other carat weights:

Diamond Ring on Hand © CreditDonkey

The size also depends on the shape of the diamond. Some shapes appear larger even if they're the same carat weight. Here's how 3-carat diamonds of different shapes compare:

3 Carat Diamond - Size Illustrated © CreditDonkey

Round and asscher cuts tend to look the smallest. Elongated shapes like oval, marquise, pear, and emerald cuts are known for appearing larger.

Here are the surface areas of 3-carat diamonds of different shapes:

• Round: 9.3 x 9.3 mm
  
• Princess: 8 x 8 mm
  
• Cushion: 9 x 8 mm
  
• Oval: 11.5 x 7.5 mm
  
• Emerald: 9.5 x 7 mm
  
• Asscher: 8 x 8 mm
  
• Pear: 11.5 x 7.5 mm
  
• Marquise: 14 x 7 mm
  
• Radiant: 8.5 x 7.5 mm
  
• Heart: 9.4 x 9.4 mm

Color for a 3 Carat Diamond

Larger diamonds reveal tints of color more easily. But it doesn't mean you need to splurge for a colorless diamond. If you prefer an icy white look to your jewelry, we recommend that you don't go below an H.

If you don't mind a warmer look or plan to set the diamond in a yellow gold band, then a J or K could look beautiful. Below is a H diamond set in platinum and a K diamond set in yellow gold. You can see that the warmer toned diamond looks great in a yellow gold band (and costs a lot less).

Screenshot from James Allen Website

Some people like to spend extra on a colorless diamond, which is great if you want to splurge. But unless someone's really scrutinizing your ring under a microscope, H diamonds look perfectly white.

Check out 360-degree videos of 3-carat diamonds to see what's right for you:

• D - F diamonds (Biggest splurge)
  
• H diamonds (Best value)
  
• J - K diamonds (For yellow gold setting)

See: Best Diamond Color for Your Money

Clarity for a 3 Carat Diamond

Diamond Clarity Scale © CreditDonkey

Larger diamonds also show more flaws as their facets are larger. So, it becomes even more important to make sure that it's eye-clean. Usually, we recommend VS1 clarity to be on the safe side if you're buying from an online store without photos.

But in reality, you can go down to VS2 if you are able to see actual photos/videos of the diamond to verify that it's eye-clean.

For emerald and asscher cut diamonds, we don't recommend going below VS1. These step cut diamonds have a large open table that reveals all flaws. So we suggest upgrading the clarity.

Cut Quality for a 3 Carat Diamond

Cut is the most important factor. It's what makes a diamond brilliant and beautiful. Cut refers to the angles and proportions that affect how light is reflected back.

A well-cut diamond reflects almost all the light back. The diamond will be sparkly and bright, making it appear larger. On the other hand, a poorly cut diamond will "leak" light and appear dull.

Here are diamonds of different cut qualities. You can easily see that the better the cut, the more beautiful the diamond.

Screenshot from James Allen Website

With a showstopper like a 3-carat diamond, the last thing you want is a large stone that doesn't sparkle. So always get the best cut possible.

If you have a certain budget, go down in color and clarity as much as you can before you consider going down in cut. (Or consider a smaller diamond or a different shape that looks larger.)

In other words, do not sacrifice cut just to meet this 3-carat mark. For a rock this large, the last thing you want is one that doesn't sparkle.

Related: Why Cut Is the Most Important of the 4Cs

Recommendations for a 3 Carat Diamond Ring

• Round, princess, and cushion: Go for a color of H and clarity of VS2 for an eye-clean diamond that appears white. If your budget is a bit smaller, it's okay to go down to color I.

• Oval, pear, and marquise: These shapes have elongated ends, which trap more color. We recommend you go up to G in color.

• Emerald and asscher: These step-cuts have a large window straight into the depth of the diamond. Any flaws or color are more easily seen. We recommend you go up to clarity of VS1 and color G.

• Yellow gold or rose gold band: You can afford to go for a warmer toned diamond to complement the band. You can go down to a K in color.

Lab Certification for 3 Carat Diamond

Lab certification is so important that it's often called the 5th C. A lab report verifies the quality of the diamond. So you know that you're getting what you paid for.

We recommend diamonds that are GIA or AGS certified. These two laboratories have the highest, most consistent grading standards.

While GIA and AGS certified diamonds are more expensive, this is an area you should not compromise on, especially for such a valuable stone.

Shop Online for the Best Value and Selection

To truly get the best deal on a 3-carat diamond, we recommend that you shop online. 3-carat diamonds are very rare. We can pretty much guarantee that your local jeweler will not have a ton in their collection. You may be stuck with just one or two choices, and neither may be within your budget or preferred specs.

On the other hand, online stores have a much bigger selection. You'll have so many more options to choose from, so you can pick one with the characteristics you want. For example, currently on James Allen, there are over 200 ideal cut 3-carat round diamonds with color H+ and clarity VS2+.

What If You Don't Have the Budget?

Ok so maybe you wanted to get your sweetie the large rock of her dreams, but realized it's not quite financially feasible. Here are some suggestions to make a large diamond more affordable.

• Consider a lab created diamond. Lab created diamonds are identical to the ones mined from the Earth - just that the diamond creation process is sped up in a controlled lab environment. Besides being more eco-friendly, lab diamonds can cost as much as 70% less. A good quality 3-carat lab diamond costs around $10,000 - $15,000.

• Use a halo setting. The halo setting is best for making a splash with less money. It has a ring of small diamonds around the center stone, so from far away, it looks like one big diamond. A halo can add 2mm width to the overall diameter, so this means that a 1.5-carat diamond with a halo can have the same surface area as a 3-carat diamond. Compared to the $30k+ cost of a 3-carat diamond, a 1.5-carat diamond costs around $10k.

  If your budget is even smaller, you can do a double halo, like the ring from James Allen below. This adds even more width.

  You can now go down to just a 1-carat diamond. A 1-carat diamond will cost around $5,000 - $6,000 and then add in $2,100 for this ring. And you can get a large looking ring on a small budget.

  Double Halo Diamond Engagement Ring via James Allen

  Warning: Before you go this route, make sure your girl will appreciate this style. Make sure she's the type of girl who loves showing off flashy jewelry, as some girls may think this is too over the top.
  

• Go for a cluster ring. A bunch of smaller diamonds is a lot cheaper than one single large diamond. A cluster setting is when a bunch of small diamonds are placed together to give the appearance of one diamond. This style looks especially good with vintage designs.

• Look into three stone rings. Certain three stone designs also give a ring major bling. You can choose a setting that comes to a total of 3 carats. For example, you can get a 1.5-carat center, with two 0.75-carat diamonds on either side. You can even get a three stone design with a halo around it, which means you can do an even smaller center.

  The three stones represent the past, present, and future of the relationship. This setting is good for the sentimental girl.

  3 Stone Diamond Engagement Ring via James Allen

Bottom Line

We hope this guide gave you an idea of what you can expect to pay for a 3-carat diamond.

Before you start shopping, make sure you understand how diamonds are priced. This way, you don't overpay for features that you cannot even see. Our beginner's guide to best value explains more about what to look for and what you can "go cheap" on.