Best Place to Buy Lab Grown Diamonds Online in 2023

Recommended Provider: If you are looking to buy the perfect lab diamond for that special someone, you can fully trust James Allen. Their comprehensive selection and world-class service is unmatched. Plus, for a limited time get 10% OFF select lab diamonds here.

Wondering the best place to buy lab grown diamond online from?

You're in the right place! 

In this Learning Jewelry guide I'll answer common questions for brides like:

Best Place to Buy Lab Grown Diamonds Online
  • Who sells the best lab diamonds?
  • What to look for when buying the best man-made diamond?
  • Are you getting a good deal on a lab grown diamond ring?
  • What red flags to watch before you buy lab grown diamonds

Best Online Lab Grown Diamond Companies

If you need the list quick, here are my top picks for the best online lab grown diamonds from reputable dealers. 

1. James Allen

lab created diamonds from James Allen

Why Buy With James Allen?

James Allen is the best place to buy lab grown diamonds for brides.

Here's why:

They offer around the best 36,000 loose diamonds of various shapes. Some are as small as .21 carats and others as large as 6 carats! 

You'll love this:

Each lab diamond on James Allen is a real diamond, either mined or a lab-grown diamond, NOT a diamond simulant like cubic zirconia. All of their lab created diamonds are certified by the IGI (International Gemological Institute) so you know you're getting what you pay for.

Typically, with natural diamonds, we want a certification with the GIA (Gemological Institute of America) or AGS (American Gem Society). But in the case of synthetic diamonds and similarly created diamonds, IGI certifications do the best job of pinpointing exacts. 

GIA certifications for lab grown diamonds were revamped in 2020 and are now acceptable and preferable grading reports. 

It gets better:

Diamond prices at James Allen are budget friendly because they are ALWAYS cheaper than your popular diamond retailers at brick and mortar locations (think Kay, Zales, etc). Plus, lab created diamonds are known to be between 20%-30% cheaper than similar mined diamonds, even if the created diamonds have the exact same anatomy, crystal structure, beauty, excellence and finished product.

So if you combine James Allen's standard great pricing plus the lower lab diamond prices, you can get the best round 1-carat lab created loose diamond for $2,000 less than it's mined counterpart from other bridal stores. That’s a great deal when it comes to lab created diamonds.

Check out the difference below to see what I mean:

lab-created diamond from james allen 1 carat round cut diamond
james allen lab created round cut diamond

Pretty amazing, right?

The best part is no one will know the difference; just you and your wallet!

You can rest assured that every dollar of your budget spent on James Allen's lab created diamonds for brides is money well spent.


If you want a hand to narrow down the best from the vast bridal selection, you'll be pleased to know James Allen's customer service team is highly educated and can help you pick the best diamond.

You can ask their team of gemologists literally anything about lab created diamonds — from high pressure high temperature (HTPT) techniques to the resale value of lab-grown diamonds — which we'll discuss a little later.

In summary:

At the end of the day, James Allen is the best lab grown diamond company for both high-quality and budget friendly, affordable artificially created diamonds with a fantastic lifetime warranty that covers wear and tear and routine maintenance.

Visit their official site from the button below to find the lab diamond of your dreams.

2. Brilliant Earth

lab created diamonds from brilliant earth

Why Buy With Brilliant Earth?

Brilliant Earth is one of the most popular online diamond retailers. Like James Allen, they carry a catalogue of both mined and lab grown diamonds.

Brilliant Earth is most famous for taking the extra step in ensuring that their diamonds are conflict-free.

If you've ever heard of blood diamonds, you might know that there have been many controversies over diamond mining in some places in Africa. The Kimberley Process was created to make sure commercial diamonds aren't sourced from these places. 

However, while the KP greatly reduced the accessibility of conflict diamonds, it still isn't foolproof. Brilliant Earth goes further than that. They know every bit of history and origin of their diamonds and keep detailed records.

In fact:

They trademarked the phrase Beyond Conflict Free™ to show their dedication to also make sure their conflict-free diamonds don't violate human rights, are environmentally friendly, are ethical, and their metals are sustainably sourced.

This means that the metal they use, not only doesn't come from places of war, but other terrible conditions in which miners come under while still being technically conflict-free.

Compare how much further Brilliant Earth truly goes Beyond Conflict Free™ in the image below:

brilliant earth beyond conflict free standards

Thankfully, lab-created diamonds aren't mined, so brides can trace the supply chain quite easily and know they weren't used to fund civil wars or other heinous acts in a laboratory.

It gets better: 

Brilliant Earth carries lab diamonds from .30 carats all the way up to 7 carats. They have (by far) the largest collection of man-made diamonds out of all of our retailers with over 81,000 different lab diamonds—more than the other 3 brands combined!

They even carry lab-created colored diamonds, which is unusual for lab diamonds. So if you're looking for blue, orange, pink, or some other colored diamond, do check them out. 

But let's see what kind of warranty they have?

Well, the answer is that they only have that manufacturer's warranty, which I don't like. It only covers you if there's a defect in the design. And if there is, you have to pay $50 in order to ship it so that they can evaluate if there's a defect.

If they deem so, the $50 is refunded to you. If not, you don't get the $50 back and they might ask if you want to go ahead with the repairs as well. Also, if the lab diamond engagement ring settings weren't manufactured by Brilliant Earth, they don't carry this protection either. 

They have an Extended Service Plan you can purchase , but it only lasts three years, which makes it far from the best. The prices of the plans are dependent on the setting and you don't know ahead of purchase. You can only purchase the plan over the phone, which is very inconvenient and non-transparent in my opinion.

That said:

Brilliant Earth is a solid choice if you want to choose the best LGD from an incredible selection at a fair price, while also supporting the Beyond Conflict Free™ cause.

3. Blue Nile

Why Buy With Blue Nile?

Blue Nile is one of the best places to buy lab grown diamonds online. In fact, they have the craft mastered. 

Here's why:

That's because they have a glowing trusted reputation and solid customer base as the first online diamond retailer to open back in 1999. They often do the tango with James Allen for the top spot on a lot of our articles. 

Like James Allen and Brilliant Earth, Blue Nile offers over 300,000 natural diamonds of various carat weights and grades. They also carry over 

You'll love this:

One of the advantages places like James Allen and Brilliant Earth had over Blue Nile was that they offered lab grown diamonds. Now, Blue Nile's changed up the game to offer customers over 19,000 loose lab grown diamonds of various grades and weights. 

And even better than the other diamond dealers, all of the lab grown diamonds in Blue Nile's inventory are GIA graded diamonds, which is the top grading lab in the world (the American Gem Society would disagree). Though GIA certified lab grown diamonds have been offered more ever since they revamped them back in 2020, only some retailers are able to get a bunch of them. 

Blue Nile is that retailer. 

But here's where the disadvantages come in: 

Despite customers' (and our) pleas of adding a service warranty, Blue Nile continues to offer the standard manufacturer's warranty. This only covers defects and on going issues with your lab grown diamond engagement ring. 

They offer to clean and inspect your ring for free, but you have to pay shipping to. They'll pay return shipping. Any work outside of that like retipping prongs, rhodium plating white gold ring settings, and tightening stones are all done at cost.  

They recommend you purchase jewelry insurance for your lab grown diamond ring with their partner, Jewelers Mutual. You can get a quote right there from the Blue Nile site. Jewelers Mutual is our pick for best jewelry insurance, so we definitely back them up. 

Furthermore, all of Blue Nile's Build Your Own Diamond collection comes with its own appraisal, making it easy to hand over to the insurance company you choose. 

But here's a feature that none of our other picks have: 

If you've shopped around different diamond retailers (online or offline), you probably have been told about diamond upgrade policies. Due to the value of lab diamonds fluctuating so often, most diamond retailers don't offer upgrade policies on lab grown diamonds. 

But not Blue Nile

In their new diamond upgrade policy, they offer upgrades for both their natural and lab diamond collection. And on a case by case basis, you could even upgrade from natural to lab or vice versa. 

All you have to do is spend at least 2x the value and you get the full value of your original diamond off. This is similar to brick and mortar store upgrade programs. 

All in all, Blue Nile is an excellent option to purchase an affordable lab grown diamond with. They offer them in 360˚ viewing and every single lab diamond comes with the best diamond certification in the industry. 

They may not have a great warranty, but their reputation of being a trusting company keeps customers coming back for more beautiful jewelry. And now they've got that awesome upgrade policy for lab diamonds, I'm sure even more will be buying lab grown diamonds from Blue Nile. 

4. Whiteflash

Why Buy With Whiteflash?

Whiteflash is another diamond retailer that didn't used to carry lab grown diamonds-but now they do. This can make diamond lovers rejoice all around. 

Though Whiteflash takes the last spot on best place to buy lab grown diamonds online, it's got nothing to do with quality. In fact, Whiteflash has some of the best cut diamond inventories online. 

They offer 360 viewing on their lab diamonds and all of them are either certified by the GIA or IGI grading labs. They offer two kinds of viewing tools, the sparkle and the brilliance view, which allow you to see different features of your diamond's light reflection. 

Unlike Blue Nile, Whiteflash offers a service warranty: 

However, it's not as good as James Allen's warranty plan. Whiteflash offers a free service plan, but it only lasts 1 year. It's recommended to make sure to do any final maintenance to your ring before it's up. 

Why Whiteflash Comes in at #5:

Compared to our other picks, Whiteflash's inventory of lab grown diamonds is around 6,000. That doesn't leave a whole lot to observe. 

The prices of their lab diamonds is comparable to others, but they carry lots of brand names for ring settings, which can increase your price. And though Whiteflash is a specialty retailer and provides extra documentation like the ASET and Idealscope images for their lab grown diamonds. 

This is a feature that no one else has. ASET and Idealscope images can show you how well-cut your diamond is. The white on an Ideal Scope will show you where light leaks, which doesn't reflect back to the viewer. 

At the end of the day: 

Whiteflash is a good option to buy lab grown diamonds  and ethical engagement rings from, but they're not the best. I do like the free warranty, but it's a bummer it just lasts for year. My main issue with buying lab diamonds at Whiteflash is that they don't really have any advantages over another lab diamond inventory.

Besides the ASET and Ideal scope images on their lab grown diamonds. For many people, Whiteflash's lab diamonds might not be worth the price for little visual difference from another brand. 

Lab Grown Diamonds 101

There's a lot of misinformation when it comes to what are lab-created diamonds. They are also referred to as synthetic diamonds, which is where a lot of misinformation comes from to begin with.

Synthetic diamonds and lab-grown diamonds are one in the same. They are real AND natural diamonds, but have been grown in a matter of weeks rather than billions of years like a mined diamond.

Their optical properties and physical properties are the same. The main difference between the two lab created diamonds is their origin. There are two methods of how lab diamonds are made: chemical vapor deposition (CVD) and high pressure high temperature (HPHT). 

In HPHT methods, a diamond seed (fragment of a diamond) is placed under extremely high pressure and temperatures similar to how diamonds would grow if they were in the ground.

The diamond seed can be an earth made diamonds or lab grown.  

The diamond seed is placed into a chunk carbon and put under these conditions. The carbon melts and becomes bonded to the diamond seed, turning into a lab grown diamond after it cools. Then it's shipped to one day become your lab created diamond engagement ring. 

In chemical vapor deposition, or CVD methods, they take a piece of diamond seed (commonly an HPHT diamond) and place it in a chamber. They fill the chamber with carbon gases, which ionize into a plasma-like substance that breaks down bonded molecules. This leaves the carbon to form around the seed and begin to crystallize in lab created diamonds.

Read Also: Natural Diamonds Vs Lab Created Diamonds - which is better?

What Reddit Says About Lab Grown Diamonds

Reddit has become one of the best and most reliable places to find opinions of various jewelry brands and engagement ring advice. Many jewelry brands like James Allen have their own account and thank people for purchasing with them. 

Overall, the reception to lab-grown diamonds among the r/ Engagement Rings sub-thread is very positive. Lab-grown diamonds and moissanite engagement rings seem to be the most popular these days. 

In a recent post, the price difference between lab-grown and mined diamonds has come up. Majority of retailers tell you lab diamonds are between 20%-40% cheaper than mined diamonds of the same grades. However, the Redditor has come into contact with seemingly high-quality diamonds with a bigger discount.

Reddit lab diamonds post 2022

Many Redditors assure him that it’s entirely possible and likely to find lab-grown diamonds at a bigger discount than they used to be. The production of lab diamonds has increased, as well as the number of companies producing them. To compete, companies may have excellent lab diamonds at a great price. They also indicate the pandemic had a big effect on the supply chain of natural diamonds, causing prices to go up. Lab diamond prices continue to drop. 

Alternatively, Redditors also warn that not all lab diamonds are created equal. Because of the number of production companies, the quality can be worse than others. They warn to watch out for heavily included lab diamonds or ones that have not been cut well. 

How to Buy Lab Grown Diamonds and Save Money

After considering why you should buy lab diamonds, at the top of my mind is Brilliant Earth when it comes to the best places to buy lab grown diamonds at a low price.

While you can't save too much more money with lab grown diamonds outside of buying with them, there are a couple of tricks I can reveal that'll give you the best edge to having a lab grown diamond engagement ring for even less... 

Here's how:

You see, while there's nothing we can really do to cheapen out the cut of a lab grown diamond, we CAN work with the color. 

Diamond color ranges from colorless (most expensive) to faint yellow (least expensive), and in between you can find the best lab-created blue diamonds as well.

Once you enter a L-Z color grades, you're looking at lab-created yellow diamonds. J color lab created diamonds may look faint yellow in a white gold setting, BUT put lab created diamonds in a yellow gold setting and they look colorless, not far from some of the best lab-created diamonds available.

You can save on color grade budget cost by changing the your lab created diamond engagement ring setting to yellow gold. 

You can do the same thing with clarity as well with mined diamonds, but it's not often needed with lab-grown diamonds. One of the minor differences between lab grown diamonds and mined diamonds is their inclusions.

A lab grown diamond has less obvious inclusions than a mined diamond. That's because they're not around other elements and impurities. They still get inclusions, but they're less noticeable types that don't impact beauty.

You might look for lab-grown diamonds with inclusions near the edge. As long as the inclusions are internal and not on the surface, it shouldn't affect the beauty of your lab diamond engagement ring. It also makes the price go down since you chose lab created diamonds with a lower clarity grade, while not looking much worse than some of the best lab-created diamonds. 

This is best used in halo settings. Halo settings are also a great way of making a center stone carat weight look larger, without actually being so, further bridging the gap between the lower grade and the best lab-created diamonds. 

What Red Flags to Watch Before You Buy Lab Grown Diamonds

While there are many benefits to purchasing LCDs or choosing the best one for lab grown diamond engagement rings, there are a couple things to watch out for.

These include: 

  • No Upgrades: The likelihood of what you'll pay for today's best lab made diamond engagement ring will most likely cost less a year from now. This can be quite frustrating for brides. Both lab grown diamonds and mined diamonds will be better served passed down through generations rather than an investment or reselling.
  • The other downside of the lab diamond resale value factor is that you can't upgrade LGDs either. For natural diamonds, you'll find that most retailers have an upgrade policy. The value of lab created diamonds depreciate very fast, so there wouldn't be any kind of trade-up value for your engagement ring, even if you buy the best lab-grown diamond there is.
  • Lab Created vs Cubic Zirconia: The other thing you want to think about is how lab created diamonds are often confused with diamond simulants, like zircon and cubic zirconia (CZ). While bridal and jewelry stores are advised by the FTC to disclose and distinguish simulated vs lab created diamonds, it can be difficult to know for sure if you're getting what you think you are.
  • This is especially true when buying an engagement ring in foreign markets or private diamond dealers. This is why you should always make sure to get a grading report with your lab grown diamonds.


While there are many places you can shop for lab-grown diamonds nowadays, the brands above are going to carry high-quality lab made engagement rings and the best lab created diamond stud earrings for people of all tastes and styles.  

But if you're still wondering exactly where to buy lab grown diamonds from, I do have an answer for you. 

With James Allen, you can rest assured you are shopping for the best lab created diamond engagement rings on the web. Their website and customer experience is top-notch at helping you find EXACTLY what you are looking for, and making sure that you buy the best lab-grown diamond for your needs.

Sale Alert: James Allen, our #1 ranked online diamond retailer, is currently offering 30% OFF on diamond basics. Click Here to shop the sale and save big today.

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