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Last updated: February 2026
by Rolf Hartmann, Head of Diamond Research | Senior Diamond Analyst
Lab-grown diamonds are not only cheaper than mined diamonds but also more ethical and better for the planet. That’s why lab-created diamonds are surging in popularity. But with hundreds of online jewelers now selling lab-grown diamonds, which are the best places to buy lab-grown diamonds?
We have decades of experience researching and evaluating diamonds and diamond jewelry. Finding the best and cheapest lab-grown diamond does not differ from searching for mined diamonds, and it’s just as important to buy from a reputable and trustworthy jeweler.
At LabGrownCarats, we have reviewed and secret shopped dozens of lab-grown diamond jewelers, both online and in their stores. As independent lab diamond experts, we review all the leading and major jewelers and sellers of lab-created diamonds. In this guide, we boil our in-depth lab diamond reviews down to the five best places to buy lab-grown diamonds online in 2026, so you can find the best lab-created diamonds at the best lab diamond price.
Lab-Grown Diamond Prices in 2026
Over the past few years, lab-grown diamond prices have continued to decline due to greater production technology and increased competition among online retailers.
In 2026, a 1-carat lab diamond can be found for as little as $400–$800, depending on cut, color, clarity, and certification. This makes shopping with the right retailer more important than ever, because price differences between retailers can exceed 40% for the same quality stone.
Our Recommended Best Places to Buy Lab-Grown Diamonds
If you just want the results and find out which lab diamond jewelers we recommend, we have listed them below. But we encourage you to read the full review and analysis of the best places to buy lab-created diamonds and jewelry.
- How We Tested Lab Diamond Jewelers
- Why Buy Lab-Grown Diamonds?
- The 5 Best Places to Buy Lab-Grown Diamonds Online in 2026
- How to Save Even More on Lab-Grown Diamonds Online
- Detailed Reviews of the Best Places to Buy Lab Diamonds
- James Allen Lab-Grown Diamonds
- Ritani Lab-Grown Diamonds
- Grown Brilliance Lab-Grown Diamonds
- Brilliant Earth Lab-Grown Diamonds
- With Clarity Lab-Grown Diamonds
- Lab-Grown Diamond Engagement Rings
How We Tested Lab Diamond Jewelers
It’s important to note that the quality of diamond sellers can vary greatly, and not all lab diamond jewelers offer the same level of transparency or value.
At LabGrownDiamonds, we continually research, test, and assess lab-grown diamond jewelers. With decades of diamond expertise, we assess lab diamond jewelers on crucial factors such as price, quality, shopping experience, customer service, trustworthiness, sustainability, shipping, and return policies. We have personally shopped at all the jewelers (in secret) and tested their customer support to provide an authentic review, so you can shop with confidence and find the best options available.
Our goal is simple: identify the retailers that consistently provide excellent diamonds, transparent pricing, a great shopping experience, generous return policies, and reliable customer support.
Ranking Criteria
We have evaluated and ranked all lab-grown diamond jewelers against these criteria:
- Price competitiveness
- Diamond inventory
- Jewelry and setting selection
- Diamond quality and certification access
- Shopping experience and filtering tools
- Customer service and germologist support
- Shipping, returns, and warranties
- Sustainability practices
Read about our editorial process to learn how we research, test, and evaluate lab-grown diamond jewelers.
Why Buy Lab-Grown Diamonds?
Lab-grown diamonds offer an opportunity to not only save more than 60-80% on diamonds that are identical to mined diamonds. They are also better for the environment, the planet, and its people. In fact, lab-grown diamonds are the cleaner and the only guaranteed conflict-free diamond choice!
And yes, lab-grown diamonds are just as real as those mined from the earth. The physical and chemical composition is precisely the same, and so is the brilliance. Lab-created diamonds are graded exactly like mined diamonds are by the same diamond grading institutes.
But where should you buy lab-grown diamonds? Having learned that lab-grown diamonds are far superior to mined diamonds, the next step is finding the best places to shop for them and start saving on lab-created diamonds. To help you, you can rely on our lab diamond expertise to guide you.
The 5 Best Places to Buy Lab-Grown Diamonds Online in 2026
SALES ALERT! See the best diamond deals (terms apply):
Below you will find detailed reviews of each of our recommended jewelers in 2026, so you can make an informed decision. But if you want to skip ahead and just read the key points, you can read our quick diamond jewelers presentations just below. We have highlighted the pros of each of the best lab-grown diamond sellers so you can easily see which diamond jeweler is right for you.
The best shopping experience
James Allen is the best pick if you want expert guidance with the buying process. James Allen’s superior customer service will help you make sure you end up with the perfect diamond at the lowest possible price. Keep reading below or learn more in our detailed review of James Allen.
- Outstanding customer service
- Independent expert gemologist guidance
- Excellent prices and high-quality diamonds
The cheapest lab-grown diamonds
Ritani not only has some of the absolute best prices on lab-grown diamonds. They also have the most extensive inventory of diamonds and the best options for building your own jewelry, including lab-grown diamond engagement rings. Learn more in the detailed Ritani review below.
- The lowest and extremely transparent prices
- The largest inventory of lab-grown diamonds
- Best options for building your own jewelry
The best for engagement rings
Grown Brilliance is our pick for lab diamond rings and unique jewelry designs. Their ring design tool is outstanding, allowing you to customize and render any ring design you could imagine. Grown Brilliance boasts a large selection of jewelry designs, from classic to unique designs. Learn more in our Grown Brilliance review.
- The best custom ring designer
- Most extensive selection of classic and unique jewelry designs
- Competitive prices
The best for the environment
Brilliant Earth is the best choice if environmental and ethical impact is important to you. They offer sustainably graded lab-grown diamonds, offset carbon emissions, and use recycled materials and packaging. And at very competitive prices! Learn more in the detailed review of Brilliant Earth below.
- Sustainably graded diamonds and climate-neutral
- Recycled metals and packaging materials
- Beautiful designs
The best for try-before-you-buy
With Clarity is best known for its Home Preview, which lets you try on a 3D-printed diamond ring replica – sent to your home for free! They have a large selection of jewelry and engagement rings. Learn more about With Clarity lab-grown diamond engagement rings below.
- Free Home Preview replica engagement rings
- Large selection of lab-grown diamond engagement rings
- Great prices and customer service
How to Save Even More on Lab-Grown Diamonds Online
The best places to buy lab-grown diamonds online sometimes run sales, allowing you to save even more! Follow our list of current sales at the best places to buy lab-grown diamonds online and save up to 60%.
Detailed Reviews of the Best Places to Buy Lab Diamonds
If you are still unsure which is the best place to shop for lab-grown diamonds, you can dive into our detailed reviews of each of our recommendations below.
All our recommended jewelers allow you to properly inspect and choose the perfect diamond or diamonds for your jewelry purchase. They all offer excellent customer service, dedicated gemologist support, and, importantly, the lowest prices on the market.
Read about our editorial process to learn how we research, test, and evaluate lab-grown diamond jewelers.
James Allen Lab-Grown Diamonds
James Allen is one of the leading online jewelers and one of our two all-time favorite lab-grown diamond sellers. What sets James Allen apart is the combination of high-quality lab-grown diamonds, industry-leading inspection tools, and outstanding customer support. In fact, they offer superior and unmatched customer service with on-call independent expert gemologists ready to jump on a call or chat with you to guide you through the complicated diamond purchase process. Every loose lab-grown diamond is presented with high-resolution 360° video, detailed specifications, and access to grading reports, which allows you to carefully evaluate the diamond you’re considering before making a purchase.
Why We Recommend James Allen
- Excellent selection of high-quality lab-grown diamonds
- Advanced 360° HD images and video and access to diamond certificates, and specifications.
- Independent gemologist assistance available on demand
- Customer service is friendly, responsive, and very effective
- Strong return and warranty policies
- Trusted, long-established retailer
What We Don’t Like
- Prices can be slightly higher than price-leader Ritani
Best For
- Buyers who want expert guidance
- First-time lab diamond shoppers
- Anyone who values a smooth, low-risk buying experience
James Allen 1-Carat Lab-Grown Diamond Prices (February 2026)
Searching for a 1-carat loose lab-grown diamond at James Allen, we found multiple diamonds priced around $670 for an E Color, VS1 Clarity, Ideal, Round Cut stone.
Our Verdict
James Allen remains one of the safest and most reliable places to buy lab-grown diamonds and is among our top picks for online jewelers. We cannot recommend James Allen highly enough and encourage anyone looking for a lab-created diamond to shop at James Allen. It’s an excellent choice if you want expert guidance throughout the buying process and you want to take away any risk of not ending up with anything but the perfect diamond.
Read more about James Allen in our in-depth review
Ritani Lab-Grown Diamonds
Ritani is our recommendation for shoppers who want the cheapest lab-grown diamonds online without sacrificing quality or selection.
Ritani operates a marketplace-style model that connects buyers directly with diamond suppliers. This allows them to consistently list lab-grown diamonds at some of the lowest prices on the market, often 20–40% lower than traditional online jewelers for comparable stones. Ritani offers one of the largest selections of lab-grown diamonds that we have seen at any jeweler (currently over 400,000 lab diamonds and 200,000 mined diamonds). The selection is massive and includes some of the highest-quality diamonds. You can find a diamond that fits your needs precisely at Ritani.
The diamond inspection features are not as advanced as what James Allen has in store, but more than adequate to perform the necessary due diligence before buying. You can also talk to a trained gemologist who can help guide you through the process and ensure that the diamond or diamonds you choose are perfect for your use case.
What sets Ritani apart is its partnership with physical jewelry stores, where you can inspect and pick up your purchase if you prefer to combine the experience of online and offline shopping. In addition, Ritani excels in post-purchase services, extending an array of free options (you just pay for shipping).
Why We Recommend Ritani
- Market-leading low prices on diamonds
- Massive loose-diamond inventory
- Transparent pricing
- Trained gemologist support
- Local partner store pickup options
Best For
- Budget-focused buyers
- Price comparison shoppers
- Loose lab-grown diamonds
What We Don’t Like
- Diamond videos and imagery are not as advanced as James Allen’s
Ritani 1-Carat Lab-Grown Diamond Prices (February 2026)
Searching for a 1-carat loose lab-grown diamond at Ritani, we found more than 600 stones diamonds priced around $440 for an E Color, VS1 Clarity, Ideal, Round Cut lab diamond.
Our Verdict
Ritani is for anyone who values a vast selection of diamonds at the best possible prices while not compromising customer support, guidance, and service. We highly recommend Ritani for any lab-grown diamond shopping – particularly when you value free services many years after purchase.
If your priority is getting the largest, best-quality diamond for the lowest possible price, Ritani is extremely hard to beat.
Read our detailed review of Ritani
Grown Brilliance Lab-Grown Diamonds
Grown Brilliance is our top pick for shoppers focused on lab-grown diamond engagement rings and customization.
We really think Grown Brilliance stands out with its innovative and fabulous ring design tool. The ring design tool lets you view a high-resolution 3D model of the ring set with the diamond of your choice. You can view it from any angle and customize it with countless ring designs and diamond combinations. It’s simple and easy to use, and in our opinion, it’s the best ring design tool out there.
By pairing one of their superb diamonds with a ring from one of the best and largest collections of rings, the ring designer enables you to create the perfect lab-grown diamond engagement ring.
Additionally, Grown Brilliance is almost as environmentally friendly as Vrai (see our Vrai review) and Brilliant Earth (see below). Some of the jewelry designs and all of their boxes are made from recycled materials. Grown Brilliance only employs lab-grown diamonds, the environmentally sustainable diamond option, though they don’t yet offer sustainably certified diamonds.
Why We Recommend Grown Brilliance
- Extensive and complete inventory of jewelry designs with any imaginable type available, design collaborations, and creative and stunning designs
- Market-leading ring designer, which allows you to customize any ring and see the exact ring in 3D, set with the diamond of your choice
- Large selection of engagement ring styles
- Virtual and in-store appointments
- Focus on sustainability
What We Don’t Like
- Not ideal for those looking for smaller carats sizes or lower color or clarity grades
- Return period begins within 30 days from the shipment date
Best For
- Engagement ring shoppers
- Custom ring designs
- Buyers who want visualization tools
Grown Brilliance 1-Carat Lab-Grown Diamond Prices (February 2026)
The inventory of loose diamonds tends to lean toward higher color grades and larger carat weights. During our search, we could not find any lab-grown diamonds exactly at 1.00 carat (the lowest available was 1.09 carats), and we had to increase the filters to D Color and VVS2 Clarity to see results. Higher color grades are commonly used for engagement rings, which explains this inventory skew.
Prices start at around $805 and and go up depending on specifications.
Our Verdict
Grown Brilliance is ideal if you want to design and visualize your engagement ring before buying. Because their inventory leans toward higher-quality and larger diamonds, Grown Brilliance is not the best option for shoppers looking for smaller or more budget-friendly stones.
Read more about why Grown Brilliance is one of our favorite places to buy lab diamonds in our detailed review of Grown Brilliance.
Brilliant Earth Lab-Grown Diamonds
Brilliant-Earth is another one of our highest-rated lab-grown diamond jewelers. Brilliant Earth is a leader in the ethical and environmentally-conscious diamond business. They offer both sustainably graded lab-grown diamonds and ensure that every step in the process is as environmentally friendly as possible. They offset carbon emissions, too, making Brilliant Earth the go-to place for the conscious lab-grown diamond consumer.
In addition, they offer a vast selection of lab-grown diamonds, only surpassed by Ritani’s record diamond inventory. Not only do they have an extensive selection of diamonds, but they are also some of the highest-quality lab diamonds available.
Brilliant Earth has one of the best customer services, and the buying experience is phenomenal. You can easily assess diamonds and get expert gemologist advice to guide you through the process of buying lab-grown diamonds.
Why We Recommend Brilliant Earth
- Strong sustainability initiatives
- Sustainably graded lab-grown diamonds
- Large jewelry and diamond selection
- Good customer support
- Modern retail showrooms
Best For
- Eco-conscious buyers
- Shoppers who want sustainable jewelry
- Buyers who prefer showroom access
What We Dont’ Like
- Prices are not always the lowest
- Some premium is paid for sustainability branding
Brilliant Earth 1-Carat Lab-Grown Diamond Prices (February 2026)
When searching for a 1-carat loose lab-grown diamond at Brilliant Earth, we found Super Ideal Cut D Color, VS1 Clarity, Round Diamonds priced around $630 and up.
Verdict
Brilliant Earth is a leader in ethical, environmentally friendly, lab-grown diamond jewelry. They are the clear choice for the conscious lab diamond consumer. Brilliant Earth takes many extra steps to ensure its climate footprint is as small as possible by offsetting carbon emissions and using recycled materials.
In addition, Brilliant Earth has an extensive selection of beautiful jewelry and the best lab-grown diamonds. The buying experience is outstanding, with great support and advice offered. Prices are generally competitive, though not usually the absolute lowest compared to competitors like Ritani.
Learn more about them in our Brilliant Earth review and why we think they are among the best places to buy lab-grown diamonds.
With Clarity Lab-Grown Diamonds
With Clarity is dedicated to selling lab-grown diamond engagement rings. And while they also retail other types of jewelry, their unique approach to selling engagement rings sets them apart.
What With Clarity does differently from any other seller we have come across is that they offer to produce a 3D-modelled replica of the engagement ring you are considering. That takes a lot of the risk and guesswork out of engagement ring shopping, arguably one of the highest-stake purchases that most people will ever make (perhaps unless you are the person being proposed to).
Notably, they will send you this replica model completely free of charge. Of course, it will not adorn the actual lab-created diamond you purchase, so this is purely for design inspection. However, this is particularly important when shopping for an engagement ring.
While they don’t offer similar advanced inspection features as James Allen or the same inventory as Ritani, they are exceptionally suitable for lab-created diamond engagement rings where ring customization is a higher priority than diamond selection and inspection.
Why We Recommend With Clarity
- Engagement-ring focused
- Free Home Preview replica ring
- Endless opportunities for ring customization
- Their support is excellent, and they will guide you expertly through the buying process.
Best For
- Engagement ring buyers
- Buyers who want to preview designs
- Custom ring shoppers
What We Don’t Like
- Smaller loose-diamond inventory than for example Ritani
- They don’t offer similar advanced inspection features as James Allen
With Clarity 1-Carat Lab-Grown Diamond Prices (February 2026)
When searching for a 1-carat loose lab-grown diamond at With Clarity, we found multiple round cut diamonds priced around $500 for E–F color, VVS2 clarity, Ideal cut, IGI-certified stones.
Our Verdict
With Clarity is for anyone looking for the best lab-grown diamond engagement ring and those who want to see it and maybe even try it before putting in the final order. Buying your engagement ring at With Clarity not only takes a lot of the uncertainty out of the buying process, but it will also get you one of the best and most radiating and beautiful diamonds for your budget. So, if you want to impress whomever you are planning to propose to, go with With Clarity.
With Clarity is our favorite lab-grown diamond jeweler dedicated to engagement rings. Their unique 3D-printed ring models, which they provide entirely free of charge, allow you to see what the ring would look like before it’s produced and you commit to purchasing. This is perfect for a high-stakes purchase, such as an engagement ring. Combined with endless customization options, a good selection of lab-created diamonds, and excellent prices, we highly recommend shopping at With Clarity.
Read more in our dedicated review of With Clarity to discover why we love With Clarity and why they are one of our top picks for lab-created engagement rings.
Lab-Grown Diamond Engagement Rings
If you’re shopping for an engagement ring, we recommend our below guides to help you through the complicated process of buying a lab-grown diamond engagement ring online:
- How to Buy a Lab-Grown Diamond Engagement Ring Online
- The 6 Best Places to Buy Lab-Grown Diamond Engagement Rings
- What you need to know before buying a lab-grown diamond engagement ring
- Tips for buying a lab-grown diamond engagement ring at James Allen
- Best sales on lab-grown diamond engagement rings
- How much does a lab-grown diamond engagement ring cost?
