Lab-grown diamonds (also called lab-created, lab-made, or synthetic diamonds) are real diamonds — chemically, physically, and optically identical to mined diamonds. They’re produced in laboratories using high-pressure, high-temperature (HPHT) or chemical vapor deposition (CVD) processes that mimic how natural diamonds form in the Earth’s mantle.
Why People Choose Lab Diamonds
✔ More affordable: Typically 30–70% cheaper than similar mined diamonds.
✔ Ethical & sustainable: Conflict-free with a smaller environmental impact.
✔ Same brilliance and durability: They score a 10 on the Mohs hardness scale — just like natural diamonds.
✔ Wide variety: Available in many cuts, sizes, and settings.
Lab diamonds are graded just like mined diamonds based on the 4Cs — Cut, Color, Clarity, and Carat — and reputable sellers include certification from labs like GIA, IGI, or AGS.
💎 Top Online Retailers for Lab Diamonds
Below are some of the most popular, trusted, and best-selling websites where you can shop lab-grown diamonds — from engagement rings to loose stones.
⭐ 1. Blue Nile
➡️ https://www.bluenile.com/diamonds/lab-grown
Great overall selection and customization tools. GIA-graded stones and extensive settings. Often highlighted as a top choice for quality and service.
💍 2. James Allen
➡️ https://www.jamesallen.com/diamonds/lab-grown/
Known for 360° high-magnification viewing — you can see every detail of the diamond. Huge inventory of lab diamonds and settings. Excellent interactive shopping tools.
🌿 3. Brilliant Earth
➡️ https://www.brilliantearth.com/lab-grown-diamonds/
Strong focus on ethical sourcing and sustainability. Virtual appointments and custom design. Mix of classic and modern jewelry pieces.
💫 4. Clean Origin
➡️ https://www.cleanorigin.com/collections/lab-grown-diamonds/
Specializes only in lab diamonds. Transparent pricing and generous return policies. Environmentally conscious brand.
💡 5. Ritani
Combines online convenience with option for in-store previews. High transparency and easy custom builds. Good balance of price and quality.
📊 6. Rare Carat
A diamond search engine that compares stones across sellers. Helpful filters and pricing transparency. Good resource to shop and compare deals.
🔗 7. Diamonds Factory
➡️ https://www.diamondsfactory.com/diamond-rings/lab-diamond
Wide range of pre-set lab diamond rings. Affordable options and classic designs.
🍾 8. Silveroni
Certified diamonds (IGI) and customizable options. Fast shipping across the USA. Good choice for classic solitaire and halo rings.
🧠 Shopping Tips for Lab Diamonds
✔ Always check certification: Diamonds should come with a lab report from GIA, IGI, or AGS.
✔ Inspect online visuals: High-resolution photos or 360° videos help ensure you know exactly what you’re buying.
✔ Understand return policies: Look for flexible returns (30–100 days) and warranties.
✔ Know your 4Cs: Quality and price vary depending on cut, color, clarity, and carat weight.
🪩 Conclusion
Lab-grown diamonds offer a beautiful, ethical, and cost-effective alternative to mined diamonds. Whether you’re buying an engagement ring, earrings, or loose stones, the online retailers above are among the most reputable and best-selling places to shop today. By comparing options and checking certifications, you can find exactly the diamond you want — without breaking the bank.