As a jewelry aficionado, I know that finding the best lab grown diamond necklace can be an overwhelming experience, with countless styles and retailers to choose from.
Over the past several years, I’ve immersed myself in the dazzling world of diamond necklaces, carefully evaluating options and hunting for the absolute best in terms of design, quality, and value.
Read Also : Lab Grown Diamond vs White Topaz: What’s the Difference?
To help you find the perfect lab grown diamond necklace, we’ve curated a list of trusted stores offering elegant, ethical, and affordable designs.
At LearningJewelry.com, our content is written by certified jewelry experts with real-world experience in the diamond industry — ensuring every recommendation is accurate, transparent, and based on genuine expertise.
You can trust us to guide you toward the best lab grown diamond necklace for your style, budget, and values.
If you’re looking for the best lab grown diamond necklace online, here are my top 3 trusted jewelry stores that combine quality, ethics, and exceptional design.
How Lab Grown Diamond Necklaces Are Made ?
A lab grown diamond necklace is crafted using diamonds created in advanced laboratories that replicate the natural diamond-forming process. These eco-friendly diamonds are then carefully set into elegant necklace designs made of precious metals like 14K or 18K gold, white gold, or platinum — delivering the same brilliance and durability as mined diamonds, but at a more accessible price.
Best 3 Online Stores to Buy a Lab Grown Diamond Necklace :
1. James Allen – Best Overall for Lab Grown Diamond Necklaces :
If you’re searching for the best lab grown diamond necklace or pendant, look no further than James Allen. After years of comparing the top online jewelers, I consistently find James Allen to be the most reliable when it comes to design quality, customer experience, and value.
James Allen offers one of the largest selections of lab grown diamond necklaces and pendants, allowing you to compare different designs and customize your perfect piece. You can choose from preset options or get creative and build your own.
shop this yellow gold lab-grown diamond pendant.
Here’s how it works: you start by selecting your preferred lab grown diamond using filters like carat, clarity, cut, and color. Then, you can pick your favorite metal setting — from platinum to yellow, white, or rose gold — to create a personalized lab grown diamond necklace that perfectly matches your unique style.
In their fashion collection, you’ll find timeless designs like diamond halo pendants, bar necklaces, and modern drop styles, all available with lab grown diamonds that sparkle beautifully. Prices range from affordable everyday pieces under $1,000 to luxurious fine jewelry options.
shop this aquamarine and diamond halo necklace today
What really makes James Allen stand out is their customer service and guarantee. Every lab grown diamond necklace comes with a lifetime warranty, covering cleaning, polishing, and even repairs for broken chains or clasps. On top of that, you have a 30-day return policy for a full refund, ensuring a risk-free shopping experience.
Pros
Lifetime warranty for wear and tear repairs
Option to customize your pendant
Affordable pricing and excellent value
GIA-certified lab grown diamonds
Cons
Some settings not available in all metals
👉 Verdict:
James Allen remains my top pick for anyone looking to buy a lab grown diamond necklace online. Between their high-quality craftsmanship, transparent policies, and customizable options, it’s hard to find a better blend of luxury and trust.
2. Brilliant Earth – Best Variety for Lab Grown Diamond Necklaces :
Brilliant Earth is one of the most trusted online jewelers, known for its ethical “Beyond Conflict Free” diamonds and sustainable craftsmanship. While many customers visit their site to design engagement rings, they also offer a stunning range of fine jewelry — especially the lab grown diamond necklace collections.
Under $1,000 — discover your perfect lab-grown diamond necklace
You can either build your own lab grown diamond necklace using their “Create Your Own” tool or explore their preset designs. The selection is versatile and elegant, making it easy to find a piece that fits any outfit or occasion. From timeless solitaire pendants to modern halo and ocean-inspired settings, every design reflects Brilliant Earth’s signature style of refined simplicity.
One of the brand’s standout features is its blockchain and recycled diamond options, offering full transparency from sourcing to sale. Their blockchain-tracked diamonds ensure complete traceability across all production stages — something that truly sets Brilliant Earth apart in the jewelry industry.
shop this emerald cut lab-grown diamond necklace for $450
When buying a lab grown diamond necklace from Brilliant Earth, customers can also opt for a 3-year Extended Service Plan that covers cleaning, inspections, and maintenance. Although it must be added through customer service (not at checkout), it’s a worthwhile option for long-term jewelry care.
Pros
Wide selection of mined and lab-grown diamonds
Elegant, sustainable necklace designs
Blockchain and recycled diamond options for solitaire pendants
Cons
Extended warranty must be added manually after purchase
No 14K gold setting options
👉 Verdict:
Brilliant Earth combines beauty, ethics, and innovation — making it an ideal choice for anyone looking for a stylish, sustainable lab grown diamond necklace backed by transparent sourcing and craftsmanship.
3. Blue Nile – Largest Selection for Lab Grown Diamond Necklaces :
When it comes to variety and trust, Blue Nile remains one of the biggest names in the online jewelry industry. The brand offers a vast selection of fine jewelry, including both classic and contemporary designs — making it an excellent place to shop for a lab grown diamond necklace that fits your style and budget.
Add a golden touch — Blue Nile’s lab-grown diamond pendant for $320
Blue Nile’s catalog includes everything from elegant solitaire lab grown diamond necklaces to fashion-forward designs like drop bars and layered pieces. Their “Build Your Own” feature also allows you to choose your own diamond based on filters such as carat, clarity, cut, and color — similar to the customization options at James Allen.
While most pieces are high-end, Blue Nile also offers more affordable lab grown diamond necklaces set in white, yellow, or rose gold, and even sterling silver for budget-conscious shoppers. Their product photography and details make online comparison simple, and if you’re not completely satisfied, Blue Nile provides a 30-day return policy with free shipping both ways, ensuring a safe and worry-free experience.
Best Blue Nile Lab-Grown Diamond Necklaces Under $1,000
Beyond the sparkle, what makes Blue Nile appealing is its massive inventory — from bridal jewelry to gemstone pieces — allowing every shopper to find the perfect match without compromise.
Pros
Massive selection of lab grown and mined diamond jewelry
Affordable options and flexible price ranges
30-day free returns and secure shopping experience
Classic and fashion-forward necklace designs
Cons
No black diamond pendants
Fancy colored diamonds cannot be set in pendants
👉 Verdict:
Blue Nile is ideal for shoppers who value selection, customization, and peace of mind. With thousands of designs and trusted service, it’s one of the best places to buy your next lab grown diamond necklace online.
Comparison Table: Best Stores to Buy Lab Grown Diamond Necklaces :
| James Allen | Brilliant Earth | Blue Nile |
|---|---|---|
| Known for its 360° HD preview tool and customizable lab grown diamond necklaces with lifetime warranty. | Focuses on ethical sourcing and sustainability, offering blockchain-tracked and recycled lab grown diamonds. | Offers a wide selection of affordable, GIA-certified lab grown diamond necklaces with free shipping and returns. |
| Price Range: $480 – $3,500 | Price Range: $450 – $2,500 | Price Range: $320 – $2,400 |
| Best For: Customization, lifetime warranty | Best For: Ethical & eco-conscious buyers | Best For: Budget-friendly variety |
| Rating: ★★★★★ | Rating: ★★★★☆ | Rating: ★★★★☆ |
Read Also : Lab Grown Diamond Resale Value – What Are They Worth?
What Are the Most Popular Types of Diamond Necklaces?
There are many different styles of diamond necklaces to choose from, each offering its own touch of beauty and personality.
If you’re looking for a complete overview, check out our Comprehensive Guide to the Most Popular Diamond Necklaces.
Before diving into the types, it’s important to note the difference between a diamond necklace and a diamond pendant —
a pendant can typically be removed or swapped out, while a necklace often has the diamonds built directly into the chain.
Here’s a professional overview of the most popular types of diamond necklaces:
1. Diamond Solitaire Pendant Necklace :
your perfect lab-grown diamond pendant awaits
A timeless classic, the diamond solitaire pendant necklace features a single sparkling diamond as its centerpiece.
Creating one is simple — just choose your diamond’s cut, color, clarity, and carat weight, then select your preferred metal setting.
Depending on the design, the pendant may be detachable or permanently fixed to the chain.
2. Drop Diamond Pendant Necklace
Blue Nile’s diamond halo necklace that shines with sophistication
Drop pendants offer a more elongated and elegant look.
These designs often include multiple diamonds arranged vertically — such as three-stone bars or journey pendants.
They typically hang a few inches lower than traditional necklaces, making them perfect for formal or layered styling.
Tip: Blue Nile offers an exquisite selection of three-stone drop pendants that pair beautifully with any outfit.
3. Y-Shaped Diamond Necklace
shop this elegant diamond Y-necklace for $2,420
The Y diamond necklace combines sophistication with versatility.
This design features diamonds integrated into the chain, creating a graceful “Y” shape that draws the eye downward.
The lower end of the Y usually includes a single dangling diamond, offering an elegant focal point.
4. Diamond and Pearl Necklace
the Athena pearl and lab-grown diamond necklace from Brilliant Earth.
A diamond and pearl necklace blends two timeless gemstones for a look of refined luxury.
Pearls add softness and femininity, while diamonds bring brilliance and sparkle.
For those who appreciate elegant classics, Brilliant Earth offers beautiful pearl and diamond combinations, including unique colored pearl options.
Understanding the Different Types of Necklace Chains
When exploring fine jewelry, especially diamond necklaces, it’s essential to understand the types of necklace chains available — because the chain design can completely transform the overall look and comfort of your piece.
From delicate, minimal chains to bold statement links, each style offers a unique personality and purpose.
The most popular types of necklace chains include the Cable, Rope, Curb, and Box chains — all beloved for their balance of strength and timeless elegance.
The Cable chain is simple and versatile, perfect for showcasing a single diamond pendant, while the Rope chain stands out for its shimmering twist pattern that catches light from every angle.
For those who value durability, the Curb chain offers a sleek, flat structure that lies smoothly against the skin.
Choosing the right chain type also depends on your lifestyle. If you wear your necklace daily, select a link pattern that resists tangling and retains shine over time. Thicker chains add durability, while thinner, polished chains give a touch of femininity and sophistication.
Ultimately, learning about different types of necklace chains helps you make an informed decision that enhances your jewelry’s beauty and longevity. A well-chosen chain not only secures your pendant but also defines the overall aesthetic — whether you’re going for a subtle everyday look or a bold, luxury statement.
Watch Before You Buy: Lab Diamond vs Natural Diamond Tennis Necklace
If you’re thinking about investing in a tennis necklace, take a moment to watch this comparison — it could save you thousands. The video breaks down the real differences between a lab diamond tennis necklace and a natural diamond tennis necklace, showing how identical they look in sparkle, shine, and elegance.
You’ll see side-by-side footage that proves lab-grown diamonds match natural diamonds in brilliance and durability but come at nearly half the price. It’s a must-watch for anyone shopping for a diamond necklace and wanting to make an informed, smart, and ethical choice.
🎥 Watch the full video to see the comparison yourself — the results might surprise you.
How to Choose the Perfect Chain for Your Diamond Necklace
Selecting the ideal chain for a lab-grown diamond necklace requires more than just matching metals — it’s about finding the right design, proportion, and comfort level. With so many types of necklace chains available, knowing what suits your neckline and style can make all the difference.
Start by considering your pendant weight and size. Lighter pendants pair beautifully with Cable or Wheat chains, while heavier diamond pendants work best with Rope, Cuban, or Figaro chains, which offer superior strength. The metal finish also plays a role; yellow gold adds warmth, white gold feels modern, and rose gold introduces a romantic tone.
The next factor is chain length. Shorter chains (16–18 inches) draw attention to the collarbone and create a delicate, elegant appearance. Longer chains (20–24 inches) lend a more dramatic and layered style — ideal for stacking multiple pieces. As you explore different types of necklace chains, think about how each length and link pattern complements your outfit and occasion.
Lastly, consider maintenance. Some chain types are easier to clean and polish than others, and a well-crafted clasp ensures security without discomfort. By understanding the structure, shine, and flexibility of various types of necklace chains, you’ll find the perfect balance between elegance, practicality, and long-term value — making your diamond necklace truly unforgettable.
And The Winner Is…
When it comes to finding the best diamond necklace, James Allen is the clear winner. Their wide selection of diamond necklaces and pendants, as well as the ability to customize your own design, ensures that you’ll find the perfect piece.
With a lifetime guarantee for wear and tear repairs and a 30-day return policy, you can feel secure in your purchase.
Whether you’re looking for a classic diamond halo pendant or a unique fancy yellow diamond necklace, James Allen has something for everyone. They have the best combination of value, selection, and service in the industry.
Read Also : Why Not to Buy a Lab Grown Diamond: The Myths & Facts
💬 FAQ When Buying Lab-Grown Diamond Necklaces Online
Buying a lab grown diamond necklace online can feel overwhelming — so here are the most common questions answered simply and clearly.
💎 1. Is It Cheaper to Buy Lab-Grown Diamond Necklaces Online?
Yes. In most cases, lab grown diamond necklaces are 30–40% more affordable than mined ones, especially when purchased online.
You also get better customization, transparent grading, and certified quality from trusted retailers like James Allen, Brilliant Earth, and Blue Nile.
⚠️ 2. What Are the Red Flags When Shopping for Lab-Grown Diamond Necklaces?
Avoid websites that:
Don’t provide certification (GIA, IGI, or GCAL).
Offer no details about diamond origin or return policy.
Sell “too cheap to be true” pieces with unclear materials.
Always check the brand’s conflict-free and ethical sourcing policy before buying.
🔗 3. What Chain Type Is Best for a Lab-Grown Diamond Necklace?
For durability and comfort, choose 14K or 18K gold chains — either white, yellow, or rose gold.
If you prefer daily wear, opt for a rope or box chain; they’re stronger and less likely to tangle or pull hair.
💰 4. How Can I Get the Best Deal on a Lab-Grown Diamond Necklace?
Compare prices across trusted retailers, use filters to find your preferred diamond specs, and check for seasonal promotions.
Proper care — such as storing your necklace separately and cleaning it regularly — also preserves its shine and value.
💵 5. How Much Does a Lab-Grown Diamond Necklace Cost?
Prices vary by carat weight, metal, and design:
Sterling silver & vermeil: $100–$250
14K gold: $300–$900
18K gold: $1,000+
Solid gold pieces are the most durable and repairable, while gold-plated options are more budget-friendly but less long-lasting.
💎 6. Are Lab-Grown Diamond Necklaces Real Diamonds?
Absolutely — lab grown diamonds are 100% real diamonds with the same chemical, physical, and optical properties as mined ones.
The only difference is their origin: they’re created in advanced laboratories using high-pressure or chemical vapor deposition methods, making them eco-friendly and conflict-free while still offering the same brilliance and sparkle.
