10 Best Online Jewelers for Lab-Grown Diamonds

All photos: Jimmy Chan

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

*Directional shares from 2025 retailer trend reports.

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.

*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.

*Directional estimate blending public online-jeweler commentary and filings; not an audited figure.

Final Thoughts…