4 Carat Lab-Grown Diamond Prices—How Much To Pay In 2024?

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Welcome to our guide on 4-carat lab-grown diamond prices. In this guide, we will explain what a 4-carat diamond is and what jewelry such a large stone works best with. We will also discuss the differences between lab-created and mined diamonds and show you how to find the best 4-carat lab diamond while saving money.

Finally, we will compare and list prices for round brilliant and popular fancy-shaped 4-carat lab-created diamonds from six of the cheapest places to buy lab diamonds. We will conclude our guide with our top recommendations for where to buy lab-grown diamonds.

The price of diamonds can differ considerably based on their grade and where they’re bought. For instance, a 4-carat lab-created diamond can range from as little as $3000 to as high as $7500, depending on its 4Cs and how rare it is. The average cost of the popular brilliant-cut round shape is around $4500, which is approximately 86% less expensive than the exact same mined diamond.

How much does a 4-carat lab-grown diamond cost?

In June 2024, an excellent quality 4-carat lab-grown diamond costs around $4,000-$5,000. However, prices range from $3000 to $7500, depending on the stone’s quality.

The cheapest places to buy a 4-carat lab-grown diamond

Buying a diamond is a considerable investment, and knowing how to choose the right stone and where to find the best deal is crucial. For this reason, we’ve created multiple tutorials to assist our readers in making informed choices.

We suggest starting by reading our buying guides below:

SALES ALERT! See the best diamond deals (terms apply):

Understanding 4-Carat Lab Diamond Prices

To begin learning about diamonds, it’s essential to understand the 4Cs. Our recommendation is to start with our guide to lab-grown diamonds. However, you can skip ahead if you’re in a hurry or only interested in the prices for 4-carat lab diamonds.

The diamond 4Cs (for mined and lab diamonds) are:

If you need a fast lab diamond-buying refresher, remember these three things:

  • First, it’s crucial to understand that the main characteristic of diamonds is their brilliance, particularly for all brilliant cut diamonds. Though brilliance is not the most critical factor for some fancy-shaped and fancy-colored diamonds, the diamond cut grade for all diamonds is still key. That’s why we always recommend prioritizing cut grade over diamond size when buying a lab-grown diamond.
  • So, it’s not the size that counts most regarding diamond quality. When deciding on the quality of a diamond, the 4Cs of diamond quality—cut, clarity, color, and carat—should all be prioritized in that order. First, aim for the best cut possible, then color and clarity grades, and carat last.
  • Select diamond weights slightly below the commonly sought-after sizes whenever feasible. Avoiding the round weights can result in significant cost savings. Nobody will be able to distinguish the difference. For instance, you can choose a 3.91-carat diamond instead of a diamond that weighs exactly 4.0 carats.

How We Collected Lab-Grown Diamond Prices

We have collected price information on 4-carat lab-created diamonds from the best online lab diamond retailers in 2024 to provide you with an estimate of their cost.

In our view, these retailers are the best and cheapest jewelers for lab diamonds and the best choices for lab-created diamond engagement rings, too. They have the largest selection of top-quality diamonds, offer exceptional shopping experiences, and provide outstanding customer service.

Our benchmark diamond is a lab-created round brilliant-cut diamond with the following 4C grades:

While our benchmark diamond may not be the ideal fit for everyone, it provides a useful example of differentiating between the 4Cs of diamonds.

June 2024 4-Carat Lab-Grown Diamond Prices

Lab diamond jeweler4-carat lab diamond prices
Clean Origin$3949-7044
With Clarity$4248-17209
Grown Brilliance$4340-6510
Brilliant Earth**$8140-21290*
James Allen**$15340-19460
Prices for 4-carat lab diamonds collected during June 2024.

Prices are accurate at the time of writing in 2024.
*Includes 100% sustainable diamonds.

**Note that Brilliant Earth and James Allen prices are for higher-quality diamonds because their minimum quality is higher than our reference minimums.

Fancy-Shaped Lab-Grown Diamond Prices

Lab-created diamonds come in various shapes and sizes, with the round brilliant-cut diamond being the most popular. However, numerous other shapes of lab-grown diamonds are available, known as fancy shapes or cuts, which are any shape other than round brilliant. As we explained in our guide to lab-grown diamond shapes, each has its distinct beauty, benefits, and disadvantages.

Some lab-grown diamond shapes, like the heart-shaped diamond, are pricier than the round brilliant cut, whereas others, such as the emerald shape, are more affordable. We’ve compiled the average price of all 4-carat fancy-shaped lab-grown diamonds to help you compare the costs of the most popular fancy shapes.

How We Compared Fancy-Shaped Lab Diamond Prices

As fancy-shaped diamonds are evaluated differently, and cut grading is less strict compared to round brilliants, we have adjusted the ranges below. Specifically, the cut rating now includes “very good,” which would not be acceptable for a brilliant round cut.

June 2024 Fancy-Shaped 4-Carat Lab-Grown Diamond Prices

The following prices are starting prices and may increase with quality. Still, they provide an overview of the price range, and all diamonds will have at least the minimum specifications mentioned.

Lab diamond shapeOvalEmeraldPearPrincessRadiantCushionHeart
Clean Origin$3508$2879$4594$2912$2937$2597$7741
With Clarity$3686$3208$3295$3405$3305
Grown Brilliance$4685$6225$8325$5205$4060$5570
Brilliant Earth*$7690$8010$6670$7190$8080$7820$10180
James Allen*$13680$5980$13030$7320$16270$9640$15650
Prices for 4-carat lab diamonds collected during June 2024.

Prices are accurate at the time of writing in 2024.
*Cut grade fancy **Higher than minimum grades.

**Note that Brilliant Earth and James Allen prices are for higher-quality diamonds because their minimum quality is higher than our reference minimums.

Why Choose a Lab-Grown Diamond?

Lab-grown diamonds can cost 60-80% less than mined diamonds with the same 4C grading. Additionally, lab-grown diamond deals can offer even more savings. Our team closely monitors the market and when diamond sellers announce special deals or discounts. Sign up below to receive notifications about new discounts on lab-grown diamonds.

In addition to being more affordable, lab-grown diamonds have other advantages over mined diamonds, including being more eco-friendly and socially responsible. You can learn more about these benefits by reading the following articles:

Prices for Sustainable Lab-Grown Diamonds

Lab-grown diamonds are an ethical and sustainable option for those looking for the best quality. However, if you’re searching for 100% sustainably produced diamonds, then lab-grown diamonds made using renewable energy, set in recycled metal, and packaged with sustainable materials are a great choice.

It’s important to note that these diamonds usually come with a price premium of 30-40%. Brilliant Earth is one of the best retailers if you’re interested in purchasing sustainable diamonds. Our Brilliant Earth review has given them a top rating for their commitment to sustainability, quality, and affordability.

Another option is Vrai, but when we compared Brilliant Earth and Vrai, we found that Brilliant Earth is the better choice for sustainable diamonds (see our Vrai review). Pandora Brilliance is also a sustainable option, as we noted in our Pandora Brilliance review, but they don’t quite match up to Vrai or Brilliant Earth.

Three 4-Carat Lab Diamond Engagement Ring Examples

There are many options available for jewelry sets that feature a 4-carat lab-grown diamond. The rings below showcase them in various styles, from classic to modern engagement ring settings. Whether you’re in the market for an engagement or anniversary ring, the 4-carat stone is a great option.

Where to Buy Lab-Grown Diamonds and Jewelry

At LabGrownCarats.com, we provide reviews of sellers that offer lab-grown diamonds to aid you in your search for the perfect lab diamond and jewelry. We also provide comparisons of the best lab diamond jewelers if you cannot decide. The following list offers our recommendations for the best places to purchase lab diamonds based on pricing, inventory, quality, sustainability, and shopping experience.

Ritani review ⭐⭐⭐⭐⭐

Ritani tops our list of the best places to buy lab-grown diamonds because of their market-leading low prices and price transparency, the most extensive inventory of lab diamonds, customization options, and jewelry store partnership. That makes Ritani one of the best places to buy a lab-grown diamond.

Ritani is one of the cheapest places to buy lab-grown diamonds.
Clean Origin is another of the best places to buy lab-created diamonds.
Clean Origin review ⭐⭐⭐⭐⭐
Clean Origin

Clean Origin is another of our favorite places to buy a lab-created diamond. We recommend Clean Origin for its unbeatable prices, a vast selection of lab-grown diamonds and jewelry, and excellent support (plus 100-day risk-free returns).

Brilliant Earth review ⭐⭐⭐⭐⭐
Brilliant Earth

Brilliant Earth is the leading sustainable lab-grown diamond jeweler. Their deep commitment to sustainability, including being the only seller of sustainable graded lab diamonds, sets them apart. See all their lab diamonds below.

Brilliant Earth is one of the best places to buy a lab-grown diamond.
James Allen is one of the best places to buy lab-created diamonds.
James Allen review ⭐⭐⭐⭐⭐
James Allen

James Allen is one of our best-rated places to buy lab-grown diamonds overall and one of the best for premium diamonds. Their service is top-notch, prices are low, and the quality and craftsmanship are superb.

Compare prices on other lab-grown diamond-carat weights

We have listed the prices of lab-grown diamonds for the most in-demand carat weights. You can compare the prices of 4-carat lab-grown diamonds with the carat weights listed below:

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Klaus T
Klaus T

At LabGrownCarats.com, Klaus is responsible for everything related to diamond analysis and valuations, the financial aspects of diamond buying, and the impact of diamond mining vs. creating diamonds in the laboratory.

Klaus possesses a profound interest and expertise in diamonds, particularly lab-grown diamonds, and has worked with diamond and lab diamond analysis and valuation for many years. Klaus is an expert in diamond prices and valuation, the investment side of diamonds, and the economic development impact of diamond mining.

Klaus is an ex-diplomat, economic development expert, ex-Googler, and start-up founder. He has 15+ years of expertise in economic development, trade, and resource extraction, and he has worked with the impact of mining on societies and the environment. He is an expert on how resources, such as gold and diamonds and diamond mining, impact communities and exporting countries, and he has worked with the UN, the World Bank, the African Union, the African Development Bank, etc. Klaus later shifted focus to work with data analysis, marketing technology, measurement, and analytics, including 7+ years at Google.

Please contact Klaus if you are looking for data and analysis related to lab-grown diamonds or if you have questions about the economic impact of diamond mining and the shift to creating diamonds in the laboratory.

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