Shopping for the best places to buy lab-grown diamond necklaces has never had more options behind it. That’s a good thing, and also a complicated one.
Lab-grown diamonds are physically and chemically identical to mined diamonds. Meanwhile, the price difference between the two is significant enough to change what’s possible within a given budget. A buyer who might have stretched for a half-carat mined stone can often afford something far more impressive in a lab-grown option.
Still, not every retailer selling lab-grown diamond necklaces does it equally well. Diamond quality varies. Certification standards differ. Pricing isn’t always as transparent as it looks on the surface.
Of course, the necklace style itself plays a role too. Solitaire pendants, tennis necklaces, and station designs: the category covers a lot of ground. And the retailer that handles one style well doesn’t always handle all of them with the same depth.
As a result, choosing where to buy matters just as much as choosing what to buy. Certification, pricing transparency, selection, and the support available during the search all shape how confident the final decision feels.
That’s precisely where this list of the best places to buy lab-grown diamond necklaces begins.
Our List of the Best Places to Buy Lab-Grown Diamond Necklaces
Lab-grown diamond necklaces look identical to mined diamond necklaces. Meanwhile, the price difference between the two often opens up options that simply weren’t there before.
That makes the retailer choice more important than many buyers initially expect.
One retailer might carry a strong selection of tennis necklaces but fall short on solitaire pendants. Another might offer competitive pricing but limited certification transparency. Meanwhile, the support available during the search varies more across retailers than most buyers realize until they’re already mid-purchase.
To put together this list of the best places to buy lab-grown diamond necklaces, we looked beyond product photos and starting prices. We evaluated each retailer based on diamond certification, selection depth, pricing transparency, customer support, and overall buying confidence.
Of course, the necklace style matters too. Lab-grown diamond necklaces cover a wide range, from delicate solitaire pendants to full tennis necklaces with significant total carat weight. And the retailers below each handle that range differently, which is exactly why each one earned a place on this list.
A Quick Comparison of the Best Places to Buy Lab-Grown Diamond Necklaces
| Retailer | Best For | Why It Stands Out |
| Rare Carat | Overall best choice | Certified lab diamonds, transparent pricing, expert guidance, and extensive selection |
| 1 Carat Lab Diamonds | Focused shopping | Straightforward collection for buyers who already know what they want |
| Ascot Diamonds | Easy shortlisting | Smaller inventory that keeps browsing simple and comparison quick |
| James Allen | Independent research | Somewhat large selection with detailed filtering tools for self-directed buyers |
| Mark Broumand | Classic styles | Compact catalog of timeless lab-grown diamond necklace designs |
1. Rare Carat – Overall Best Place to Buy Lab-Grown Diamond Necklaces
Lab-grown diamonds typically cost 50 to 70 percent less than mined diamonds of the same cut, color, clarity, and carat weight.
That gap changes what’s actually possible within a budget.
For example, a buyer who might have considered a 0.5-carat mined diamond pendant can often afford a 1.5-carat lab-grown stone at the same price point. And that too, with the same certification, the same sparkle, and the same physical properties.
Meanwhile, that advantage only holds up when the lab diamond itself is properly certified and graded.
That’s exactly why where you buy matters just as much as what you buy.
As a direct-to-consumer diamond retailer and merchant of record, Rare Carat gives lab-grown diamond shoppers access to that price advantage without sacrificing the quality assurance that makes it worth having.
The full buying experience stays consistent from first search through final delivery. No third-party handoffs, no gaps in accountability.
Still comparing the best places to buy lab-grown diamond necklaces? View more here to see how Rare Carat approaches certified lab diamond selection, pricing, and the overall buying experience.
More on the Brand
The selection covers more than 5,000 fine jewelry designs, including lab-grown diamond necklaces across a wide range of styles, settings, and total carat weights. Meanwhile, over 1.5 million natural and lab-grown diamonds sit behind that catalog.
That certification matters more with lab diamonds than many buyers initially realize. Without it, there’s no reliable way to verify the quality grade of the stone you’re paying for. Fortunately, every lab diamond at Rare Carat comes with third-party grading (GIA, IGI, or GCAL) that confirms exactly what you’re getting before any money changes hands.
Finding the right necklace still takes time, though. High-resolution imagery and 360° videos make it possible to inspect diamond quality, brilliance, and setting construction closely before buying.
Meanwhile, advanced filters let buyers narrow by diamond shape, total carat weight, color grade, clarity, metal type, and necklace style. So with this one of the best places to buy lab-grown diamond necklaces, the search stays focused rather than overwhelming.
Of course, knowing what filters to use isn’t always straightforward for first-time lab diamond buyers. That’s where Rare Carat’s recommendation engine becomes genuinely useful. It guides buyers toward options that match their priorities without requiring them to already know every variable involved.
Still, buying a diamond necklace is an involved process. Questions come up. Grades need context. Price differences between two similar stones don’t always make immediate sense. That’s why access to over 100 GIA-certified gemologists throughout the search makes such a real difference. They act as consumer advocates (not commissioned salespeople), offering honest, no-pressure guidance at every stage.
How Rare Carat Lab-Grown Diamond Necklace Pricing Compares
| Retailer | Price* (1ct Lab Diamond Solitaire Pendant, 14K White Gold) | Rare Carat Everyday | Rare Carat On Sale | Max You Save |
| James Allen | $2,100 | ~$1,550 | From $1,150 | $950 (45% less) |
| Mark Broumand | $2,350 | ~$1,550 | From $1,150 | $1,200 (51% less) |
| Ascot Diamonds | $2,050 | ~$1,550 | From $1,150 | $900 (44% less) |
| 1 Carat Lab Diamonds | $1,950 | ~$1,550 | From $1,150 | $800 (41% less) |
*Prices vary depending on lab diamond quality, carat weight, setting style, metal type, and promotional timing.
⚡ Currently live on Rare Carat: 1ct G VS1 diamonds from $395 during their 4th of July Sale (up to 40% off). Comparable diamonds at many competing retailers often sell for significantly more, making it worthwhile to check Rare Carat before purchasing elsewhere.
Pros
- Rare Carat operates entirely online, so buyers aren’t covering traditional showroom overhead. Comparable lab-grown diamond necklaces regularly come in at significantly lower prices as a result.
- Every lab diamond carries GIA, IGI, or GCAL certification, giving buyers verified quality grades rather than seller descriptions alone.
- High-resolution imagery and 360° videos make it easy to inspect lab diamond brilliance and setting construction before ordering.
- The Rare Carat Report and built-in AI tools make it easy to evaluate and compare lab diamond quality and pricing, all at no extra cost.
- Advanced filters and a recommendation engine keep the search focused without requiring buyers to already know every detail of what they’re looking for.
- Over 100 GIA-certified gemologists are available as consumer advocates throughout the process.
- Free insured shipping, a 30-day return policy, and a 100% money-back guarantee come standard on every purchase.
- Every eligible purchase also includes a lifetime manufacturer’s warranty, giving buyers extra peace of mind for years to come.
- Meanwhile, more than 7,000 five-star reviews across Google and Trustpilot show how consistently buyers rate their experience.
Cons
- Then again, buyers who prefer seeing a diamond necklace in person before buying may miss having physical stores to visit.
- For now, shipping is available only within the United States and Canada.
2. 1 Carat Lab Diamonds
Not every buyer arrives at the search undecided.
Some shoppers already know they want a lab-grown diamond necklace around a specific carat weight. They’re not looking to explore every possible variation. They just want to find a well-made option without the process becoming more complicated than it needs to be.
That’s where 1 Carat Lab Diamonds earns its place among the best places to buy lab-grown diamond necklaces.
The collection stays focused rather than expansive. Meanwhile, buyers who already have a clear sense of the style and size they’re after can move through the available options without filtering out styles that were never relevant to begin with.
Fortunately, that focus also keeps the comparison process manageable. Before long, most buyers have a small group of favorites they’re choosing between rather than another page of similar listings to scroll through.
It won’t suit every shopper. Then again, for buyers who value a direct path over an exhaustive catalog, the experience tends to feel far less overwhelming than starting with a retailer carrying thousands of variations.
Pros
- A focused collection helps buyers with clear preferences reach the right options much faster.
- Meanwhile, comparing a smaller number of lab-grown necklace styles takes considerably less time and effort.
- As a result, the buying process tends to stay more direct and less drawn out from start to finish.
Cons
- Then again, buyers still deciding between different carat weights or necklace styles may find the range limiting.
- At the same time, exploring different diamond shapes or setting options isn’t as flexible as with a larger retailer.
- Once preferences shift outside the core offering, the collection can start to feel narrow fairly quickly.
3. Ascot Diamonds
Lab-grown diamond necklaces are already a considered purchase. The search doesn’t need to feel complicated on top of that.
Some buyers find that a large inventory creates more questions than clarity. When dozens of listings look nearly identical on screen, spotting real differences becomes harder rather than easier.
Ascot Diamonds, one of the best places to buy lab-grown diamond necklaces, keeps things simpler than that.
The inventory is smaller than some of the other retailers on this list. Meanwhile, that scale works in favor of buyers who would rather spend time comparing a handful of genuine contenders.
As a result, putting together a shortlist usually takes less time. The collection stays easy to browse without feeling cluttered. Meanwhile, it’s much easier to focus on diamond quality, total carat weight, and the setting instead of sorting through endless similar designs.
Then again, buyers with very specific preferences for diamond shapes or necklace styles may want more variety. Even so, shoppers who prefer a simpler search will likely appreciate the smaller, more focused collection.
Pros
- The collection stays easy to browse, so finding a few strong options doesn’t take long.
- Meanwhile, comparing lab-grown diamond necklaces feels much easier when every listing doesn’t look the same.
- A more focused inventory often suits buyers who want a simpler path to a final decision.
Cons
- The collection doesn’t cover as many diamond shapes, necklace styles, or total carat weights as some larger retailers.
- Meanwhile, buyers with a very specific design already in mind might not find the exact match they’re after.
- Some people enjoy browsing dozens of different styles before deciding. Here, the selection is intentionally more focused.
4. James Allen
Lab-grown diamond necklace shopping has a way of evolving the longer it goes on.
A buyer who starts looking at a simple solitaire pendant often ends up comparing tennis necklaces and station designs before the session is over. Seeing more options naturally shifts what feels right. That is not always a bad thing.
James Allen, one of the best places to buy lab-grown diamond necklaces, gives shoppers plenty of room for that kind of exploration.
The larger collection includes a wide variety of necklace styles, total carat weights, and setting options. Meanwhile, detailed filters make it much easier to narrow the choices once you know what you’re looking for.
High-quality images and videos help buyers examine diamond quality and setting construction closely before committing.
Fortunately, that level of detail suits buyers who enjoy doing their own research. For shoppers who like arriving at a decision through comparison rather than recommendation, the self-directed experience tends to feel like a natural fit.
Pros
- A large inventory gives buyers genuine room to explore different lab-grown diamond necklace styles before a direction becomes clear.
- Meanwhile, filtering by carat weight, diamond shape, metal, and setting style helps narrow the shortlist as preferences develop.
- Buyers can move through the search entirely at their own pace without feeling pushed toward a particular choice.
Cons
- Still, working through a larger collection takes considerably more time than many buyers initially plan for.
- Meanwhile, several necklace styles can start looking surprisingly similar after an extended browsing session.
- Buyers who want expert guidance built into the process may find the experience more self-directed than expected.
5. Mark Broumand
Some buyers already know the kind of necklace they want before the search even begins.
They are not looking for trend-driven designs or an overwhelming catalog of variations. They want something timeless. A piece that looks just as right in ten years as it does today.
For that kind of buyer, a smaller and classically focused collection often makes the search feel more purposeful than exhausting.
That is why Mark Broumand rounds out this list of the best places to buy lab-grown diamond necklaces.
The catalog stays compact and leans toward classic styles rather than covering every possible variation. Meanwhile, with fewer designs to work through, the details that matter most are easier to notice. Stone shape, setting construction, and overall proportions all get more attention when there are fewer distractions competing for it.
Fortunately, that focused approach suits buyers who arrive with a clear sense of direction. Then again, shoppers hoping to explore a wider range of styles may eventually find the selection a little tight for that kind of open-ended search.
Pros
- A compact catalog makes it easier to focus on the details of each necklace style without getting pulled in too many directions.
- Meanwhile, classic designs appear consistently throughout the collection, giving it a noticeably timeless feel.
- Before long, most buyers have a manageable shortlist without spending hours narrowing things down.
Cons
- Then again, buyers who want more necklace styles to compare may find the collection a little too focused.
- Meanwhile, very specific design preferences aren’t always easy to match with a smaller inventory.
- Some customers just like to have more options before buying, and with a larger collection, they have that flexibility.
Which of the Best Places to Buy Lab-Grown Diamond Necklaces Offers the Best Value?
| Retailer | Lab-Grown Diamond Necklace Selection | Buyer Support | Typical Starting Price* | Potential Savings | Overall Rating |
| Rare Carat | Extensive certified lab diamond necklace selection | 100+ GIA Gemologists | From ~$850 | Often 20–40% lower than many traditional jewelers | ⭐⭐⭐⭐⭐ |
| 1 Carat Lab Diamonds | Focused collection for buyers with clear preferences | Standard | From ~$1,100 | Typically 5–10% below many traditional jewelers | ⭐⭐⭐⭐☆ |
| Ascot Diamonds | Manageable inventory that keeps browsing simple and clean | Standard | From ~$1,350 | Competitive pricing on select styles | ⭐⭐⭐☆☆ |
| James Allen | Somewhat large inventory with filtering tools for self-directed buyers | Self-guided tools | From ~$1,200 | Typically 5–15% below many brick-and-mortar retailers | ⭐⭐⭐☆☆ |
| Mark Broumand | Compact catalog of classic lab-grown diamond necklace styles | Standard | From ~$1,600 | Limited discounting compared with larger online retailers | ⭐⭐⭐☆☆ |
*Starting prices are approximate and based on comparable lab-grown diamond necklace styles. Diamond quality, certification, setting design, and promotional timing can all affect the final price.
Final Thoughts on the Best Places to Buy Lab-Grown Diamond Necklaces
A lab-grown diamond necklace offers something that wasn’t always easy to find in fine jewelry. Genuine diamond quality at a price point that leaves room to go bigger, go better, or simply stay within budget without compromise.
That advantage only holds up when the retailer behind the purchase holds up, too.
No two retailers on this list approach the experience the same way. Some keep the search focused and simple. Others give buyers more room to explore before deciding. Meanwhile, the level of support, certification standards, and pricing transparency varies more across retailers than most buyers expect going in.
Still, Rare Carat continues to stand out as the strongest all-around choice for most buyers.
The experience starts with over 1.5 million certified natural and lab-grown diamonds.
Fortunately, advanced filters, a recommendation engine, and the Rare Carat Report all help buyers move through that selection with confidence rather than confusion. More than 100 GIA-certified gemologists are also available throughout the process. As a result, every decision along the way feels more informed and far less like guesswork.
A lab-grown diamond necklace is often a piece you will wear far beyond the occasion that inspired the purchase. Finding the best places to buy lab-grown diamond necklaces is really about choosing a retailer that makes you feel just as confident after the purchase as you did before it.