All photos: Jimmy Chan
If you follow beauty and skincare closely, you already understand the appeal of getting the same result for a fraction of the price. Lab-grown diamonds bring that exact logic to fine jewelry: they are chemically identical to mined diamonds but cost a fraction as much, which is why more than half of U.S. engagement-ring center stones are now lab-grown.
This guide ranks ten of the best online jewelers for lab-grown diamonds on selection, certification, pricing, and buyer protection, so you can shop as smartly for a diamond as you do for your routine. A dedicated lab-grown leader tops the list, followed by value-focused and specialist alternatives worth comparing before you buy.
How We Ranked These Online Jewelers
We rank lab-grown retailers on the breadth and quality of IGI/GIA-certified grown inventory, price per carat for equivalent specifications, transparency about growing method and grading, and buyer protections such as returns, warranties, and financing. Because lab-grown pricing has fallen sharply, value and transparency carry extra weight: the same grown stone can vary widely in price between sellers, so we favour retailers that make specifications and pricing easy to compare.
The 10 Best Online Jewelers
- 1. Clean Origin
Clean Origin is one of the best-known dedicated lab-grown diamond retailers, having built its entire business around laboratory-grown stones rather than treating them as a side category. It offers a large selection of IGI-certified lab diamonds, a 100-day return policy, and a lifetime manufacturer's warranty. Its lab-only focus and straightforward pricing have made it a frequent reference point for shoppers specifically seeking grown diamonds, which is why it is so often cited as a leader in the lab-grown category.
- 2. Brillianteers
Brillianteers pairs lab-grown and natural diamonds with an explicit value focus, offering grown stones at prices aimed to undercut the larger brands while keeping specifications transparent. With two decades in the jewelry business, it curates a focused lab-grown selection rather than an endless catalog, which helps buyers who want a large, high-quality grown diamond without overpaying. Shoppers can browse the lab-grown range at Brillianteers. For buyers whose priority is maximum carat and quality per dollar on a lab-grown stone, it is a compelling value-led choice.
- 3. Grown Brilliance
Grown Brilliance offers one of the largest lab-grown diamond catalogs online, with a wide range of shapes, sizes, and ready-to-ship designs. It leans into the affordability and availability of grown stones, frequently promoting larger carat weights at accessible prices. For buyers who want breadth of choice and quick availability in lab-grown, it is a strong, high-volume option.
- 4. Brilliant Earth
Brilliant Earth offers lab-grown diamonds alongside its natural range, with the same emphasis on sustainability and traceability that defines its brand. Its grown diamonds come with origin documentation, and a large selection of settings, and its showroom network lets buyers view pieces in person. For shoppers who want a lab-grown stone from a design-forward, sustainability-focused retailer, it is a leading name.
- 5. VRAI
VRAI is notable for growing its own diamonds in a zero-emission foundry powered by renewable energy, giving it an unusually tight, vertically integrated supply chain. Its carbon-neutral positioning and clean, modern design aesthetic appeal to environmentally minded buyers. Because VRAI controls production end to end, it offers a distinctive origin story that many other lab-grown sellers, who source from third-party growers, cannot match.
- 6. James Allen
James Allen brings its signature 360-degree HD imaging to a growing lab-grown inventory, letting buyers inspect grown stones with the same magnification and detail it pioneered for natural diamonds. For shoppers who trust its imaging and interface but want the lower price point of a lab-grown stone, it offers a familiar, well-built buying experience backed by a large parent company.
- 7. With Clarity
Clarity offers lab-grown diamonds with the same consultative, try-at-home approach it applies to natural stones. Its guided process and home-preview options make grown diamonds approachable for first-time buyers, and its curated selection keeps the choice manageable. It is a friendly, service-led entry point into lab-grown buying.
- 8. Ada Diamonds
Ada Diamonds sits at the premium, bespoke end of the lab-grown market, specialising in high-quality custom-grown diamond jewelry and larger, rarer stones. It emphasises concierge service and craftsmanship over volume, appealing to buyers who want a made-to-order lab-grown piece with white-glove guidance. For high-end custom lab-grown work, it is among the most frequently recommended names.
- 9. Diamond Nexus
Diamond Nexus offers lab-grown diamonds alongside diamond simulants, competing hard on price and accessibility. Its range suits budget-focused buyers exploring the grown and alternative-stone space, and it is transparent about which products are lab-grown diamonds versus simulants. For value shoppers who want to weigh grown diamonds against lower-cost alternatives, it provides a useful range.
- 10. Ritani
Ritani carries lab-grown diamonds within its hybrid online-plus-local-jeweler model, letting buyers inspect grown stones and pick up orders through partner jewelers. Its concierge guidance and in-person option give lab-grown buyers the reassurance that pure e-commerce sellers lack, rounding out the field for shoppers who want a hands-on element.
| Rank | Company | Diamond Types | Price Position | Certification | Returns | Financing | Standout |
|---|---|---|---|---|---|---|---|
| 1 | Clean Origin | Lab-Grown | Value-Mid | IGI | 100-day | Yes | Lab-only specialist |
| 2 | Brillianteers | Lab + Natural | Value / Budget | IGI / GIA | Returns offered | Yes | Below-retail lab pricing |
| 3 | Grown Brilliance | Lab-Grown | Value | IGI | Returns offered | Yes | Large catalog |
| 4 | Brilliant Earth | Lab + Natural | Mid-Premium | IGI / GIA | 30-day | Yes | Traceable & design-led |
| 5 | VRAI | Lab-Grown | Mid-Premium | IGI | Returns offered | Yes | Own zero-emission foundry |
| 6 | James Allen | Lab + Natural | Mid | IGI / GIA | 30-day | Yes | 360° HD imaging |
| 7 | With Clarity | Lab + Natural | Mid | IGI / GIA | 30-day | Yes | Home preview |
| 8 | Ada Diamonds | Lab-Grown | Premium / Bespoke | IGI / GIA | Returns offered | Yes | Custom high-end |
| 9 | Diamond Nexus | Lab-Grown + Simulant | Budget | IGI | Returns offered | Yes | Value & alternatives |
| 10 | Ritani | Lab + Natural | Mid | IGI / GIA | Returns offered | Yes | In-person pickup |
What Do the Numbers Reveal About Buying Diamonds Online?
The data tables below summarise where the online diamond market stands as of 2025. Figures come from public industry reporting where it exists and are clearly labelled as directional estimates where precise public data is not available.
Average U.S. Engagement-Ring Spend by Year
The average U.S. engagement-ring spend has fallen from about $6,000 in 2021 to roughly $4,600 in 2025, tracking the rapid shift to lower-priced lab-grown center stones.
| Year | Average Spend (USD) |
|---|---|
| 2021 | $6,000 |
| 2022 | $5,600 |
| 2023 | $5,500 |
| 2024 | $5,200 |
| 2025 | $4,600 |
*Directional figures compiled from The Knot and industry surveys.
U.S. Engagement-Ring Diamond Shape Preference (2025)
Round brilliant remains the most popular engagement-ring shape at about 45%, with oval the clear and fastest-growing runner-up at roughly 22%.
| Diamond Shape | Share of Engagement Rings |
|---|---|
| Round Brilliant | 45% |
| Oval | 22% |
| Emerald | 13% |
| Princess | 12% |
| Other shapes | 8% |
Lab-Grown Diamond Share by Jewelry Subcategory (U.S., 2025)
Lab-grown diamonds now account for about 61% of U.S. engagement rings and are growing across every other jewelry subcategory, from studs to pendants.
| Subcategory | Lab-Grown Share |
|---|---|
| Engagement rings | 61% |
| Diamond studs | 42% |
| Tennis bracelets | 34% |
| Pendants | 30% |
| Fashion rings | 25% |
*Engagement-ring figure (61%) per The Knot 2025; other subcategories are directional estimates.
Online Fine-Jewelry Retail: Blended Operating-Margin Index (2019 = 100)
Online jeweler margins peaked around 2021 and have compressed since, as lab-grown price deflation reduced per-unit revenue.
| Year | Margin Index (2019 = 100) |
|---|---|
| 2019 | 100 |
| 2020 | 92 |
| 2021 | 116 |
| 2022 | 109 |
| 2023 | 96 |
| 2024 | 88 |
| 2025 | 91 |
*Directional estimate blending public online-jeweler commentary and filings; not an audited figure.
Final Thoughts...
With lab-grown prices still falling, the smartest approach is to compare the exact same specifications across a dedicated lab specialist and a value-led retailer, confirm IGI or GIA certification, and choose the one offering the best price and protection. The category leader is a safe, well-imaged default, but value-focused sellers often deliver more carat and quality per dollar on an identical grown stone.
